Tutorial 3: Call SAP Concur APIs Using A Multiple Use Bearer Token

Use a refresh token to get a multiple use bearer token to call an API.

Prerequisites

• You have created a Refresh Token from an API call and managed refresh token expiration using the previous Refresh Token Management Automation tutorial.
• SAP Concur instance credentials
• Node.js
• GitHub account
• IDE or text editor

You Will Learn

How to use a refresh token to get a multiple use bearer token to call an API.

Regenerate Your Company Request Token

1. Go to the Company Request Token screen.
2. Enter your App ID in the required field and click Submit to regenerate your company request token.
3. Copy/paste the Company UUID and company request token fields to a text file.
4. Click OK after you have saved this information to a text file.

Setup the NodeJs App

1. Get the NodeJs sample code.
2. Open SampleCode/Tutorial_3/CallingAPIs.js in your IDE or text editor.

Regenerate Your Credentials File

1. Type node CallingAPIs.js in terminal to run the app to generate your credentials.json file. This generates messages in the terminal that show the credentials object.
2. Fill in the empty fields in this file with the information in the credential object. You can use all of the information from your credentials.json file in the Refresh Token Management Automation tutorial except for the company request token.

Regenerate and Store Your Refresh Token in a JSON File

1. Run the app again. Since the app does not have a stored valid refresh token, the app will not find a valid refresh token in refreshTokenObjectFile.json.
2. The app will call the Oauth2 token endpoint using your credentials and regenerate your refresh token.
3. If the API call is successful, the refresh token data is converted from JSON format into a refresh token object and stored in the file refreshTokenObjectFile.json.

Load Your Stored Refresh Token from a JSON File

1. Run the app again. Since the app now has a valid refresh token, the app will successfully load and check the validity of the file refreshTokenObjectFile.json.
2. Check for a successful validity check on the refresh token object loaded from refreshTokenObjectFile.json. If the refresh token object validity check is successful, the refresh token object will be stored in the app to make API calls.

Call an API Using a Multiple Use Bearer Token

1. The app will use the validated refresh token in the refresh token object to make an API call to get a bearer token.
2. If the API call is successful, the bearer token data is converted from JSON format into a bearer token string.
3. The bearer token string is used to make the API call to the Profile from ID v4 endpoint.
4. If the API call is successful, the JSON response is displayed on the console.