Request OAuth Token

<!-- Grants documentation taken from: https://oauth2.thephpleague.com/ -->

Flow

The client sends a POST request with following body parameters to the authorization server:

• grant_type with the value client_credentials
• client_id with the client's ID
• client_secret with the client's secret

The authorization server will respond with a JSON object containing the following properties:

• token_type with the value Bearer
• expires_in with an integer representing the TTL (in seconds) of the access token (Default is 8 hours)
• access_token a JWT signed with the authorization server's private key

The access_token should be used in the Authorization header together with the Bearer challenge to authenticate all the requests.

Example: Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c.

{
  "grant_type": "client_credentials",
  "client_id": "12345667-890a-bcde-f123-34567890abcd"
}

{
  "token_type": "Bearer"
}