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Resource Owner Password Credentials Grant Type

The resource owner password credentials grant type is suitable in cases where the resource owner has a trust relationship with the client (e.g., a service’s own mobile client) and in situations where the client can obtain the resource owner’s credentials.

How does it work?

Instead of redirecting the user to the authorization server, the client itself will prompt the user for the resource owner's username and password. The client will then send these credentials to the authorization server along with the client’s own credentials.

Password grant flow

One of the following cURL commands can be used to try this grant type.

Request 1

curl -v -X POST -H "Authorization: Basic <Base64Encoded(CLIENT_ID:CLIENT_SECRET)>" -k -d "grant_type=password&username=<USERNAME>&password=<PASSWORD>" -H "Content-Type:application/x-www-form-urlencoded" <TOKEN_ENDPOINT>

Request 2

curl -u <CLIENT_ID>:<CLIENT_SECRET> -k -d "grant_type=password&username=<USERNAME>&password=<PASSWORD>" -H "Content-Type:application/x-www-form-urlencoded" <TOKEN_ENDPOINT>

You will receive a response similar to the format below.



Support for refresh token grant

This grant type issues a refresh token which can be used to obtain new access tokens using the refresh token grant.

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