1. Register your application in Xero
   
2. Create a connection for Xero
   
3. Create a custom function in FSM
   

Register your application in Xero 

1. Log in to Xero Developer.
   
2. Under My Apps, click New App.
   
   
   
   
3. Enter the following details and click Create App:
   a. App name: FSM
   b. Integration type: Web app
   c. Company or application URL: https://fsm.zoho.com/home
   d. Redirect URI: https://deluge.zoho.com/delugeauth/callback
   e. Accept the Terms & Conditions.
   
   

Create a connection for Xero

1. Navigate to Setup > Automation > Connections.
   
2. Select Custom Services and click Create Service.
   
   
   
   
3. Enter the following details and click Create Service.
   a. Service Name: Xero
       The Service Link Name will be automatically populated.
   b. Authentication Type: OAuth2
   c. Parameter Type: Header
   d. Grant Type: Authorization Code
   e. Client ID, Client Secret
       The steps to obtain the Client ID, and Client Secret are mentioned here.
   f. Authorize URL: https://login.xero.com/identity/connect/authorize
   g. Access Token URL: https://identity.xero.com/connect/token
   h. Refresh Token URL: https://identity.xero.com/connect/token
   i. Scopes (refer to the table below). Choose Space for Scope Delimiter.
   
   

   Scope	Scope Display Name
   accounting.transactions	accounting.transactions
   email	email
   openid	openid
   profile	profile

   
   
   
   
4. Click Create Connection.
   
   
   
   
5. In the Create Connection page, do the following and click Create And Connect:
   a. Enter a Connection Name
   b. Disable Use Credentials of Login User
   c. Choose all the scopes
   
   
   
   
6. Click Connect.
   
   
   
   
7. Log in to your Xero account.
   
   
   
   
8. To authenticate your login, either use the notification sent to your phone or the backup method.
   
   
   
   
9. In case you are using the backup method, choose a method.
   
   
   
   
10. In case you have chosen Backup email address, click Send Code.
    
    
    
    
11. Enter the code and click Log in.
    
    
    
    
12. Click Allow access for 30 minutes.
    
    
    

Create a custom function

1. Navigate to Setup > Automation > Functions and click Create Function.
   
2. Enter the following details:
   a. Function Name: XeroTest
   b. Select a Module, say, Contacts
   c. Copy the script below:
   
   

   response = invokeurl   [    url :"https://api.xero.com/connections"    type :GET    connection:"xero"   ];   info response;

1. In the Deluge Script Editor, click Save & Execute.
   
   
   
   
2. In the Execute Function pop-up, enter a Record ID or click Click here to get the list to obtain the list of available records.
   
   
   
   
3. Select a record and click Execute.
   
   
   
   
4. Click Execute.