When i hit the below url https://platform.ringcentral.com/restapi/oauth/authorize?response_type=code&redirect_uri=https://myapp.example.com/oauth2Callback&client_id=avalidclientid&display=&prompt= then get the issue
{ "error" : "invalid_client", "errors" : [ { "errorCode" : "OAU-153", "message" : "Invalid client: sM54NwmFSIK0wxKSo5SSFA", "parameters" : [ { "parameterName" : "client_id", "parameterValue" : "sM54NwmFSIK0wxKSo5SSFA" } ] } ], "error_description" : "Invalid client: sM54NwmFSIK0wxKSo5SSFA" }