diff --git a/packages/nodes-base/credentials/GoogleApi.credentials.ts b/packages/nodes-base/credentials/GoogleApi.credentials.ts
index f64704b722..bf177281b9 100644
--- a/packages/nodes-base/credentials/GoogleApi.credentials.ts
+++ b/packages/nodes-base/credentials/GoogleApi.credentials.ts
@@ -17,18 +17,18 @@ export class GoogleApi implements ICredentialType {
 			default: '',
 			description: 'The Google Service account similar to user-808@project.iam.gserviceaccount.com.',
 			required: true,
-
 		},
 		{
 			displayName: 'Private Key',
 			name: 'privateKey',
 			type: 'string',
 			default: '',
-			description: 'Use the multiline editor. Make sure there are exactly 3 lines.<br />-----BEGIN PRIVATE KEY-----<br />KEY IN A SINGLE LINE<br />-----END PRIVATE KEY-----',
+			placeholder: '-----BEGIN PRIVATE KEY-----\nXIYEvQIBADANBg<...>0IhA7TMoGYPQc=\n-----END PRIVATE KEY-----\n',
+			description: 'Enter the private key located in the JSON file downloaded from Google Cloud Console',
 			required: true,
 		},
 		{
-			displayName: ' Impersonate a User',
+			displayName: 'Impersonate a User',
 			name: 'inpersonate',
 			type: 'boolean',
 			default: false,
diff --git a/packages/nodes-base/nodes/Google/Books/GenericFunctions.ts b/packages/nodes-base/nodes/Google/Books/GenericFunctions.ts
index c3ed803d3f..a387aa71c3 100644
--- a/packages/nodes-base/nodes/Google/Books/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Google/Books/GenericFunctions.ts
@@ -16,6 +16,13 @@ import * as moment from 'moment-timezone';
 
 import * as jwt from 'jsonwebtoken';
 
+interface IGoogleAuthCredentials {
+	delegatedEmail?: string;
+	email: string;
+	inpersonate: boolean;
+	privateKey: string;
+}
+
 export async function googleApiRequest(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string, resource: string, body: any = {}, qs: IDataObject = {}, uri?: string, headers: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
 	const authenticationMethod = this.getNodeParameter('authentication', 0, 'serviceAccount') as string;
 	const options: OptionsWithUri = {
@@ -37,13 +44,16 @@ export async function googleApiRequest(this: IExecuteFunctions | IExecuteSingleF
 		}
 
 		if (authenticationMethod === 'serviceAccount') {
-			const credentials = await this.getCredentials('googleApi');
+			const credentials = await this.getCredentials('googleApi') as {
+				email: string;
+				privateKey: string;
+			};
 
 			if (credentials === undefined) {
 				throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
 			}
 
-			const { access_token } = await getAccessToken.call(this, credentials as IDataObject);
+			const { access_token } = await getAccessToken.call(this, credentials as unknown as IGoogleAuthCredentials);
 
 			options.headers!.Authorization = `Bearer ${access_token}`;
 			//@ts-ignore
@@ -78,7 +88,7 @@ export async function googleApiRequestAllItems(this: IExecuteFunctions | ILoadOp
 	return returnData;
 }
 
-function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, credentials: IDataObject): Promise<IDataObject> {
+function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, credentials: IGoogleAuthCredentials): Promise<IDataObject> {
 	//https://developers.google.com/identity/protocols/oauth2/service-account#httprest
 
 	const scopes = [
@@ -87,7 +97,8 @@ function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoa
 
 	const now = moment().unix();
 
-	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n');
+	credentials.email = credentials.email.trim();
+	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n').trim();
 
 	const signature = jwt.sign(
 		{
diff --git a/packages/nodes-base/nodes/Google/Docs/GenericFunctions.ts b/packages/nodes-base/nodes/Google/Docs/GenericFunctions.ts
index 7e64e27946..0a49079e92 100644
--- a/packages/nodes-base/nodes/Google/Docs/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Google/Docs/GenericFunctions.ts
@@ -17,6 +17,13 @@ import * as moment from 'moment-timezone';
 
 import * as jwt from 'jsonwebtoken';
 
+interface IGoogleAuthCredentials {
+	delegatedEmail?: string;
+	email: string;
+	inpersonate: boolean;
+	privateKey: string;
+}
+
 export async function googleApiRequest(
 	this: IExecuteFunctions | ILoadOptionsFunctions,
 	method: string,
@@ -50,7 +57,7 @@ export async function googleApiRequest(
 				throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
 			}
 
-			const { access_token } = await getAccessToken.call(this, credentials as IDataObject);
+			const { access_token } = await getAccessToken.call(this, credentials as unknown as IGoogleAuthCredentials);
 
 			options.headers!.Authorization = `Bearer ${access_token}`;
 			return await this.helpers.request!(options);
@@ -84,7 +91,7 @@ export async function googleApiRequestAllItems(this: IExecuteFunctions | ILoadOp
 	return returnData;
 }
 
-function getAccessToken(this: IExecuteFunctions | ILoadOptionsFunctions, credentials: IDataObject): Promise<IDataObject> {
+function getAccessToken(this: IExecuteFunctions | ILoadOptionsFunctions, credentials: IGoogleAuthCredentials): Promise<IDataObject> {
 	//https://developers.google.com/identity/protocols/oauth2/service-account#httprest
 
 	const scopes = [
@@ -95,7 +102,8 @@ function getAccessToken(this: IExecuteFunctions | ILoadOptionsFunctions, credent
 
 	const now = moment().unix();
 
-	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n');
+	credentials.email = credentials.email.trim();
+	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n').trim();
 
 	const signature = jwt.sign(
 		{
diff --git a/packages/nodes-base/nodes/Google/Drive/GenericFunctions.ts b/packages/nodes-base/nodes/Google/Drive/GenericFunctions.ts
index d762a5f075..73a86434d8 100644
--- a/packages/nodes-base/nodes/Google/Drive/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Google/Drive/GenericFunctions.ts
@@ -19,6 +19,13 @@ import * as moment from 'moment-timezone';
 
 import * as jwt from 'jsonwebtoken';
 
+interface IGoogleAuthCredentials {
+	delegatedEmail?: string;
+	email: string;
+	inpersonate: boolean;
+	privateKey: string;
+}
+
 export async function googleApiRequest(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions | IPollFunctions, method: string, resource: string, body: any = {}, qs: IDataObject = {}, uri?: string, option: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
 	const authenticationMethod = this.getNodeParameter('authentication', 0, 'serviceAccount') as string;
 
@@ -47,7 +54,7 @@ export async function googleApiRequest(this: IExecuteFunctions | IExecuteSingleF
 				throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
 			}
 
-			const { access_token } = await getAccessToken.call(this, credentials as IDataObject);
+			const { access_token } = await getAccessToken.call(this, credentials as unknown as IGoogleAuthCredentials);
 
 			options.headers!.Authorization = `Bearer ${access_token}`;
 			return await this.helpers.request!(options);
@@ -83,7 +90,7 @@ export async function googleApiRequestAllItems(this: IExecuteFunctions | ILoadOp
 	return returnData;
 }
 
-function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions | IPollFunctions, credentials: IDataObject): Promise<IDataObject> {
+function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions | IPollFunctions, credentials: IGoogleAuthCredentials): Promise<IDataObject> {
 	//https://developers.google.com/identity/protocols/oauth2/service-account#httprest
 
 	const scopes = [
@@ -94,7 +101,8 @@ function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoa
 
 	const now = moment().unix();
 
-	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n');
+	credentials.email = credentials.email.trim();
+	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n').trim();
 
 	const signature = jwt.sign(
 		{
diff --git a/packages/nodes-base/nodes/Google/Gmail/GenericFunctions.ts b/packages/nodes-base/nodes/Google/Gmail/GenericFunctions.ts
index 353cbf5f95..cce89cc47a 100644
--- a/packages/nodes-base/nodes/Google/Gmail/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Google/Gmail/GenericFunctions.ts
@@ -3,7 +3,6 @@ import {
 } from 'request';
 
 import {
-	ParsedMail,
 	simpleParser,
 } from 'mailparser';
 
@@ -29,6 +28,13 @@ import * as moment from 'moment-timezone';
 
 import * as jwt from 'jsonwebtoken';
 
+interface IGoogleAuthCredentials {
+	delegatedEmail?: string;
+	email: string;
+	inpersonate: boolean;
+	privateKey: string;
+}
+
 const mailComposer = require('nodemailer/lib/mail-composer');
 
 export async function googleApiRequest(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string,
@@ -63,7 +69,7 @@ export async function googleApiRequest(this: IExecuteFunctions | IExecuteSingleF
 				throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
 			}
 
-			const { access_token } = await getAccessToken.call(this, credentials as IDataObject);
+			const { access_token } = await getAccessToken.call(this, credentials as unknown as IGoogleAuthCredentials);
 
 			options.headers!.Authorization = `Bearer ${access_token}`;
 			//@ts-ignore
@@ -202,7 +208,7 @@ export function extractEmail(s: string) {
 	return data.substring(0, data.length - 1);
 }
 
-function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, credentials: IDataObject): Promise<IDataObject> {
+function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, credentials: IGoogleAuthCredentials): Promise<IDataObject> {
 	//https://developers.google.com/identity/protocols/oauth2/service-account#httprest
 
 	const scopes = [
@@ -216,7 +222,8 @@ function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoa
 
 	const now = moment().unix();
 
-	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n');
+	credentials.email = credentials.email.trim();
+	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n').trim();
 
 	const signature = jwt.sign(
 		{
diff --git a/packages/nodes-base/nodes/Google/Sheet/GenericFunctions.ts b/packages/nodes-base/nodes/Google/Sheet/GenericFunctions.ts
index 96d8a6530e..81aa75a506 100644
--- a/packages/nodes-base/nodes/Google/Sheet/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Google/Sheet/GenericFunctions.ts
@@ -9,7 +9,6 @@ import {
 } from 'n8n-core';
 
 import {
-	ICredentialDataDecryptedObject,
 	ICredentialTestFunctions,
 	IDataObject, NodeApiError, NodeOperationError,
 } from 'n8n-workflow';
@@ -18,6 +17,13 @@ import * as moment from 'moment-timezone';
 
 import * as jwt from 'jsonwebtoken';
 
+export interface IGoogleAuthCredentials {
+	delegatedEmail?: string;
+	email: string;
+	inpersonate: boolean;
+	privateKey: string;
+}
+
 export async function googleApiRequest(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string, resource: string, body: any = {}, qs: IDataObject = {}, uri?: string, headers: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
 	const authenticationMethod = this.getNodeParameter('authentication', 0, 'serviceAccount') as string;
 	const options: OptionsWithUri = {
@@ -45,7 +51,7 @@ export async function googleApiRequest(this: IExecuteFunctions | IExecuteSingleF
 				throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
 			}
 
-			const { access_token } = await getAccessToken.call(this, credentials as ICredentialDataDecryptedObject);
+			const { access_token } = await getAccessToken.call(this, credentials as unknown as IGoogleAuthCredentials);
 
 			options.headers!.Authorization = `Bearer ${access_token}`;
 			//@ts-ignore
@@ -82,7 +88,7 @@ export async function googleApiRequestAllItems(this: IExecuteFunctions | ILoadOp
 	return returnData;
 }
 
-export function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions | ICredentialTestFunctions, credentials: ICredentialDataDecryptedObject): Promise<IDataObject> {
+export function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions | ICredentialTestFunctions, credentials: IGoogleAuthCredentials): Promise<IDataObject> {
 	//https://developers.google.com/identity/protocols/oauth2/service-account#httprest
 
 	const scopes = [
@@ -93,7 +99,8 @@ export function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions
 
 	const now = moment().unix();
 
-	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n');
+	credentials.email = credentials.email.trim();
+	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n').trim();
 
 	const signature = jwt.sign(
 		{
diff --git a/packages/nodes-base/nodes/Google/Sheet/GoogleSheets.node.ts b/packages/nodes-base/nodes/Google/Sheet/GoogleSheets.node.ts
index bdb211c02c..ce2c80b5cc 100644
--- a/packages/nodes-base/nodes/Google/Sheet/GoogleSheets.node.ts
+++ b/packages/nodes-base/nodes/Google/Sheet/GoogleSheets.node.ts
@@ -29,6 +29,7 @@ import {
 	getAccessToken,
 	googleApiRequest,
 	hexToRgb,
+	IGoogleAuthCredentials,
 } from './GenericFunctions';
 
 export class GoogleSheets implements INodeType {
@@ -1018,7 +1019,7 @@ export class GoogleSheets implements INodeType {
 		credentialTest: {
 			async googleApiCredentialTest(this: ICredentialTestFunctions, credential: ICredentialsDecrypted): Promise<NodeCredentialTestResult> {
 				try {
-					const tokenRequest = await getAccessToken.call(this, credential.data!);
+					const tokenRequest = await getAccessToken.call(this, credential.data! as unknown as IGoogleAuthCredentials);
 					if (!tokenRequest.access_token) {
 						return {
 							status: 'Error',
diff --git a/packages/nodes-base/nodes/Google/Slides/GenericFunctions.ts b/packages/nodes-base/nodes/Google/Slides/GenericFunctions.ts
index 71f9505685..629d8c8c12 100644
--- a/packages/nodes-base/nodes/Google/Slides/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Google/Slides/GenericFunctions.ts
@@ -11,12 +11,20 @@ import {
 	ICredentialDataDecryptedObject,
 	IDataObject,
 	NodeApiError,
+	NodeOperationError,
 } from 'n8n-workflow';
 
 import * as moment from 'moment-timezone';
 
 import * as jwt from 'jsonwebtoken';
 
+interface IGoogleAuthCredentials {
+	delegatedEmail?: string;
+	email: string;
+	inpersonate: boolean;
+	privateKey: string;
+}
+
 export async function googleApiRequest(
 	this: IExecuteFunctions | ILoadOptionsFunctions,
 	method: string,
@@ -46,8 +54,13 @@ export async function googleApiRequest(
 
 	try {
 		if (authenticationMethod === 'serviceAccount') {
-			const credentials = await this.getCredentials('googleApi') as { access_token: string, email: string, privateKey: string };
-			const { access_token } = await getAccessToken.call(this, credentials);
+			const credentials = await this.getCredentials('googleApi');
+
+			if (credentials === undefined) {
+				throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
+			}
+
+			const { access_token } = await getAccessToken.call(this, credentials as unknown as IGoogleAuthCredentials);
 			options.headers.Authorization = `Bearer ${access_token}`;
 			return await this.helpers.request!(options);
 
@@ -65,7 +78,7 @@ export async function googleApiRequest(
 
 function getAccessToken(
 	this: IExecuteFunctions | ILoadOptionsFunctions,
-	credentials: ICredentialDataDecryptedObject,
+	credentials: IGoogleAuthCredentials,
 ) {
 	// https://developers.google.com/identity/protocols/oauth2/service-account#httprest
 
@@ -76,7 +89,8 @@ function getAccessToken(
 
 	const now = moment().unix();
 
-	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n');
+	credentials.email = credentials.email.trim();
+	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n').trim();
 
 	const signature = jwt.sign(
 		{
diff --git a/packages/nodes-base/nodes/Google/Translate/GenericFunctions.ts b/packages/nodes-base/nodes/Google/Translate/GenericFunctions.ts
index 5bc3b98310..50ab4c153c 100644
--- a/packages/nodes-base/nodes/Google/Translate/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/Google/Translate/GenericFunctions.ts
@@ -16,6 +16,13 @@ import * as moment from 'moment-timezone';
 
 import * as jwt from 'jsonwebtoken';
 
+interface IGoogleAuthCredentials {
+	delegatedEmail?: string;
+	email: string;
+	inpersonate: boolean;
+	privateKey: string;
+}
+
 export async function googleApiRequest(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string, resource: string, body: any = {}, qs: IDataObject = {}, uri?: string, headers: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
 	const authenticationMethod = this.getNodeParameter('authentication', 0, 'serviceAccount') as string;
 	const options: OptionsWithUri = {
@@ -43,7 +50,7 @@ export async function googleApiRequest(this: IExecuteFunctions | IExecuteSingleF
 				throw new NodeOperationError(this.getNode(), 'No credentials got returned!');
 			}
 
-			const { access_token } = await getAccessToken.call(this, credentials as IDataObject);
+			const { access_token } = await getAccessToken.call(this, credentials as unknown as IGoogleAuthCredentials);
 
 			options.headers!.Authorization = `Bearer ${access_token}`;
 			//@ts-ignore
@@ -76,7 +83,7 @@ export async function googleApiRequestAllItems(this: IExecuteFunctions | ILoadOp
 	return returnData;
 }
 
-function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, credentials: IDataObject): Promise<IDataObject> {
+function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, credentials: IGoogleAuthCredentials): Promise<IDataObject> {
 	//https://developers.google.com/identity/protocols/oauth2/service-account#httprest
 
 	const scopes = [
@@ -86,7 +93,8 @@ function getAccessToken(this: IExecuteFunctions | IExecuteSingleFunctions | ILoa
 
 	const now = moment().unix();
 
-	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n');
+	credentials.email = credentials.email.trim();
+	const privateKey = (credentials.privateKey as string).replace(/\\n/g, '\n').trim();
 
 	const signature = jwt.sign(
 		{