grantType
Supports the following OAuth grant types: Authorization Code, Refresh Token, JWT Bearer, and Token Exchange. Specify one of the following values, depending on the grant type that you want:
Authorization Code -
authorization_code
Refresh Token -
refresh_token
JWT Bearer -
urn:ietf:params:oauth:grant-type:jwt-bearer
Token Exchange -
urn:ietf:params:oauth:grant-type:token-exchange