feat: game lobby service

pkg/model/user/user.go

@@ -29,8 +29,9 @@ type GetMyAccountRequest struct{}
 // UpdateMyProfileRequest stores the authenticated self-service profile
 // mutation request.
 type UpdateMyProfileRequest struct {
-	// RaceName stores the requested exact replacement race name.
-	RaceName string `json:"race_name"`
+	// DisplayName stores the requested replacement display name. An empty
+	// value resets the stored display name.
+	DisplayName string `json:"display_name"`
 }
 
 // UpdateMySettingsRequest stores the authenticated self-service settings
@@ -134,8 +135,12 @@ type Account struct {
 	// Email stores the exact-after-trim login e-mail address.
 	Email string `json:"email"`
 
-	// RaceName stores the current user-facing race name.
-	RaceName string `json:"race_name"`
+	// UserName stores the immutable `player-<suffix>` handle assigned at
+	// account creation.
+	UserName string `json:"user_name"`
+
+	// DisplayName stores the current optional free-text user label.
+	DisplayName string `json:"display_name,omitempty"`
 
 	// PreferredLanguage stores the current BCP 47 language tag.
 	PreferredLanguage string `json:"preferred_language"`