ADD: added basic cli tool and updated the login modal

backend/internal/auth/handler.go

@@ -15,6 +15,14 @@ type LoginRequest struct {
 	Password string `json:"password"`
 }
 
+type RegisterRequest struct {
+	Email    string `json:"email"`
+	Password string `json:"password"`
+	Username string `json:"username"`
+}
+
+const defaultRole = "user"
+
 var secret = []byte("secret")
 
 func Login(c *gin.Context, db *sql.DB) {
@@ -49,6 +57,26 @@ func Login(c *gin.Context, db *sql.DB) {
 
 }
 
+func Register(c *gin.Context, db *sql.DB) {
+	var req RegisterRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request"})
+		return
+	}
+	if req.Email == "" || req.Password == "" || req.Username == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Email and password are required"})
+		return
+	}
+
+	error := user.CreateUser(db, req.Email, req.Username, req.Password, []string{defaultRole})
+	if error != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": error.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"message": "User created successfully"})
+
+}
+
 func GenerateJWT(uuid string, email string, roles []string) (any, error) {
 	token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
 		"user":  uuid,