refactor: use dtos in controllers

backend/internal/dto/user_dto.go

@@ -0,0 +1,30 @@
+package dto
+
+import "time"
+
+type UserDto struct {
+	ID        string `json:"id"`
+	Username  string `json:"username"`
+	Email     string `json:"email" `
+	FirstName string `json:"firstName"`
+	LastName  string `json:"lastName"`
+	IsAdmin   bool   `json:"isAdmin"`
+}
+
+type UserCreateDto struct {
+	Username  string `json:"username" binding:"required,username,min=3,max=20"`
+	Email     string `json:"email" binding:"required,email"`
+	FirstName string `json:"firstName" binding:"required,min=3,max=30"`
+	LastName  string `json:"lastName" binding:"required,min=3,max=30"`
+	IsAdmin   bool   `json:"isAdmin"`
+}
+
+type OneTimeAccessTokenCreateDto struct {
+	UserID    string    `json:"userId" binding:"required"`
+	ExpiresAt time.Time `json:"expiresAt" binding:"required"`
+}
+
+type LoginUserDto struct {
+	Username string `json:"username" binding:"required"`
+	Password string `json:"password" binding:"required"`
+}