Fix references

server/models/role.go

@@ -5,5 +5,5 @@ import "gorm.io/gorm"
 type Role struct {
 	gorm.Model
 	Name  string
-	Users []User
+	Users []*User `gorm:"many2many:user_roles;"`
 }

server/models/user.go

@@ -7,6 +7,6 @@ type User struct {
 	UUID     string
 	Email    string
 	Password string
-	Roles    []Role
-	Sessions []Session
+	Roles    []*Role `gorm:"many2many:user_roles;"`
+	Sessions []*Session
 }