Can't get the basic token

Question

I created an App in the sandbox, with permissions for SMS and Read-Only. Password-Flow enabled (and private). Client ID is lXbnBnjyQcywt2tt0NFfVA if you want to check.

I plan on accessing it via a FileMaker app API call, but am unable to get the basic credential token, even using Postman. Screenshots from Postman attached...

If I put the grant_type in the body, I get this error:

{    "errorCode": "CMN-001",    "message": "Unable to parse URI query",    

"errors": [        {            "errorCode": "CMN-001",            "message": "Unable to parse URI query"        }    ]}

If I put the grant_type in the header, I get this error:

 "error": "invalid_request",   

 "errors": [        {            "errorCode": "OAU-250",            "message": "Unsupported grant type"        }    ],    

"error_description": "Unsupported grant type"}

Any advice would be appreciated...

Thanks!

Anonymous · Accepted Answer

Please test this sample curl code snippet for authentication :curl --location --request POST 'https://platform.[devtest].ringcentral.com/restapi/oauth/token'--header 'Authorization: Basic [base 64 encoded clientID:clientsecret]'--header 'Accept: application/json'--header 'Content-Type: application/x-www-form-urlencoded;charset=UTF-8'--data-urlencode 'grant_type=password'--data-urlencode 'username= [main phone number]'--data-urlencode 'password= [password]'--data-urlencode 'extension=[extension-number]'