It seems that the password credentials constant is missing.

[ziponia]

https://github.com/spring-projects/spring-security/blob/master/oauth2/oauth2-core/src/main/java/org/springframework/security/oauth2/core/AuthorizationGrantType.java

I think that password credentials should be provided as a constant for external use.

Also, the refresh token entry is missing from the description. (Line 29)

[jgrandja]

@ziponia Support for the password grant will soon be merged via #7013, which adds AuthorizationGrantType.PASSWORD.