"Client_assertion_type is missing" in keycloak

Question

I try to get an access token from the superuser so that I can also create new users in the key coat, I deployed keycloak in wildfly, and when I try to get a call, I get Invalid user credentialsas an answer, How do I know the actual credentials?

And when I try to update the password from the console, I get an error message as shown below.

Since I am new to this and cannot find enough information from the Internet, any help would be appreciated.

Updated:

Now I get a new error description Parameter client_assertion_type is missingas shown below. What should be client_assertion_typehere?

Answer 1

, , , . , grant_type, , , . keycloak api .

, - . . "realm-management", , " ". . HTTP- 403, , , , .

Answer 2

keycloak :

Q: : * client_assertion_type [invalid_client].

A: , JWT, , --keystore .

JWT Keycloak.