I have created one Rest webservice in SFDC (which I want to expose to other users) and set up one CUSTOMER community User.

Login URL:


I am trying to retrieve access_token using postman but getting the response:

"error": "invalid_grant",
"error_description": "authentication failure"

params which i send with request are :

client_id,client_secret,username,password,grant_type="password", response_type="code",content-type="application/x-www-form-urlencoded"

where username is community user`s username and his password.

How we can retrieve session id for community user using REST API ?

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