Metadata Repositories: Support Bearer Token Authentication Docs

Signed-off-by: Valentijn Scholten <[email protected]>

docs/_docs/datasources/repositories.md

@@ -61,8 +61,11 @@ for information on Package URL and the various ways it is used throughout Depend
 
 ### Authentication
 
+For each repository a Username and Password can be specified to perform Basic Authentication.
+To use Bearer Token authentication, leave the Username field empty and fill out the Token in the Password field.
+
 #### GitHub
 
 For GitHub repositories (`github.com` per default), the username should be the GitHub account's username,
 and the password should be a [personal access token](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/creating-a-personal-access-token)
-(PAT) with public access (no additional scopes).
+(PAT) with public access (no additional scopes).