Made all types implement Identifiable

arn/NickToUser.go

@@ -5,3 +5,8 @@ type NickToUser struct {
 	Nick   string `json:"nick" primary:"true"`
 	UserID UserID `json:"userId"`
 }
+
+// GetID returns the primary key which is the nickname.
+func (mapping *NickToUser) GetID() string {
+	return mapping.Nick
+}