Add a duplicate authenticate:login API verb (#912)

internal/servers/controller/handler_test.go

@@ -137,6 +137,7 @@ func TestHandleImplementedPaths(t *testing.T) {
 			"v1/accounts/someid:set-password",
 			"v1/accounts/someid:change-password",
 			"v1/auth-methods/someid:authenticate",
+			"v1/auth-methods/someid:authenticate:login",
 			"v1/groups/someid:add-members",
 			"v1/groups/someid:set-members",
 			"v1/groups/someid:remove-members",