feat: dbcontext abstraction via dependency

backend/internal/controllers/auth.go

@@ -1,6 +1,7 @@
 package controllers
 
 import (
+	"easywish/internal/models"
 	"easywish/internal/services"
 	"net/http"
 
@@ -72,9 +73,25 @@ func (a *authControllerImpl) Refresh(c *gin.Context) {
 // @Tags Auth
 // @Accept json
 // @Produce json
+// @Param request body models.RegistrationBeginRequest true "desc"
 // @Router /auth/registrationBegin [post]
 func (a *authControllerImpl) RegistrationBegin(c *gin.Context) {
-	c.Status(http.StatusNotImplemented)
+
+	var request models.RegistrationBeginRequest
+	
+	if err := c.ShouldBindJSON(&request); err != nil {
+		c.Status(http.StatusBadRequest)
+		return
+	}
+
+	_, err := a.authService.RegistrationBegin(request)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, err.Error())
+		return
+	}
+
+	c.Status(http.StatusAccepted)
+	return
 }
 
 // RegistrationBegin implements AuthController.