post https://api.phone.com/v4/oauth/access-token
The OAuth 2.0 Authorization Framework enables a third-party application to obtain limited access to HTTP API requests which require an access token. This page describes how to use the /oauth/authorization and /oauth/access-token API's to generate an access token.
To create an access token via the /oauth/access-token API, an API user may choose any one of the grant types it supports: Authorization Code Grant, Client Credential Grant, Password Credential Grant or Refresh Token Grant. Provide "?mode=details" in query string to receive response identical to GET /v4/oauth/access-token/details