Using Externally-Obtained Access Tokens
In addition to the above grant types, the EMS client APIs and the EMS server can be configured to use access tokens obtained via external means. If access tokens are directly configured in this manner, the EMS server and client APIs will not attempt to obtain access tokens using the OAuth 2.0 grants.
Note:
The EMS client APIs additionally support user-defined callbacks for obtaining access tokens. This method of obtaining access tokens requires the use of new APIs. Existing EMS client applications will need to be modified to use the new APIs in order to make use of this method. Refer to the corresponding client API documentation for details.
User-defined callbacks are only available in the client APIs. This method of obtaining access tokens is not supported in the EMS server.