diff --git a/backend/cmd/main.go b/backend/cmd/main.go
index 57612c0..b69e2e8 100644
--- a/backend/cmd/main.go
+++ b/backend/cmd/main.go
@@ -24,6 +24,7 @@ import (
 	"easywish/config"
 	docs "easywish/docs"
 	"easywish/internal/controllers"
+	"easywish/internal/database"
 	"easywish/internal/logger"
 	"easywish/internal/routes"
 	"easywish/internal/services"
@@ -43,6 +44,7 @@ func main() {
 			logger.NewLogger,
 			gin.Default,
 		),
+		database.Module,
 		services.Module,
 		controllers.Module,
 		routes.Module,
diff --git a/backend/docs/docs.go b/backend/docs/docs.go
index 044b645..137d474 100644
--- a/backend/docs/docs.go
+++ b/backend/docs/docs.go
@@ -128,6 +128,17 @@ const docTemplate = `{
                     "Auth"
                 ],
                 "summary": "Register an account",
+                "parameters": [
+                    {
+                        "description": "desc",
+                        "name": "request",
+                        "in": "body",
+                        "required": true,
+                        "schema": {
+                            "$ref": "#/definitions/models.RegistrationBeginRequest"
+                        }
+                    }
+                ],
                 "responses": {}
             }
         },
@@ -310,6 +321,21 @@ const docTemplate = `{
                     "type": "string"
                 }
             }
+        },
+        "models.RegistrationBeginRequest": {
+            "type": "object",
+            "properties": {
+                "email": {
+                    "type": "string"
+                },
+                "password": {
+                    "description": "TODO: password checking",
+                    "type": "string"
+                },
+                "username": {
+                    "type": "string"
+                }
+            }
         }
     },
     "securityDefinitions": {
diff --git a/backend/docs/swagger.json b/backend/docs/swagger.json
index 2133584..b1d469a 100644
--- a/backend/docs/swagger.json
+++ b/backend/docs/swagger.json
@@ -124,6 +124,17 @@
                     "Auth"
                 ],
                 "summary": "Register an account",
+                "parameters": [
+                    {
+                        "description": "desc",
+                        "name": "request",
+                        "in": "body",
+                        "required": true,
+                        "schema": {
+                            "$ref": "#/definitions/models.RegistrationBeginRequest"
+                        }
+                    }
+                ],
                 "responses": {}
             }
         },
@@ -306,6 +317,21 @@
                     "type": "string"
                 }
             }
+        },
+        "models.RegistrationBeginRequest": {
+            "type": "object",
+            "properties": {
+                "email": {
+                    "type": "string"
+                },
+                "password": {
+                    "description": "TODO: password checking",
+                    "type": "string"
+                },
+                "username": {
+                    "type": "string"
+                }
+            }
         }
     },
     "securityDefinitions": {
diff --git a/backend/docs/swagger.yaml b/backend/docs/swagger.yaml
index 507b388..66a9a37 100644
--- a/backend/docs/swagger.yaml
+++ b/backend/docs/swagger.yaml
@@ -21,6 +21,16 @@ definitions:
       refresh_token:
         type: string
     type: object
+  models.RegistrationBeginRequest:
+    properties:
+      email:
+        type: string
+      password:
+        description: 'TODO: password checking'
+        type: string
+      username:
+        type: string
+    type: object
 info:
   contact: {}
   description: Easy and feature-rich wishlist.
@@ -97,6 +107,13 @@ paths:
     post:
       consumes:
       - application/json
+      parameters:
+      - description: desc
+        in: body
+        name: request
+        required: true
+        schema:
+          $ref: '#/definitions/models.RegistrationBeginRequest'
       produces:
       - application/json
       responses: {}
diff --git a/backend/internal/controllers/auth.go b/backend/internal/controllers/auth.go
index 23edbf7..0a6cb77 100644
--- a/backend/internal/controllers/auth.go
+++ b/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.
diff --git a/backend/internal/errors/auth.go b/backend/internal/errors/auth.go
index a3d0959..55d13cf 100644
--- a/backend/internal/errors/auth.go
+++ b/backend/internal/errors/auth.go
@@ -9,4 +9,5 @@ var (
 	ErrUsernameTaken = errors.New("Provided username is already in use")
 	ErrInvalidCredentials = errors.New("Invalid username, password or TOTP code")
 	ErrInvalidToken = errors.New("Token is invalid or expired")
+	ErrServerError = errors.New("Internal server error")
 )
diff --git a/backend/internal/services/auth.go b/backend/internal/services/auth.go
index 55dafef..fe50e1c 100644
--- a/backend/internal/services/auth.go
+++ b/backend/internal/services/auth.go
@@ -1,10 +1,14 @@
 package services
 
 import (
+	"context"
 	"easywish/internal/database"
 	errs "easywish/internal/errors"
+	"easywish/internal/logger"
 	"easywish/internal/models"
 	"easywish/internal/utils"
+
+	"go.uber.org/zap"
 )
 
 type AuthService interface {
@@ -15,14 +19,29 @@ type AuthService interface {
 }
 
 type authServiceImpl struct {
+	log logger.Logger
+	dbctx database.DbContext
 }
 
-func NewAuthService() AuthService {
-	return &authServiceImpl{}
+func NewAuthService(_log logger.Logger, _dbctx database.DbContext) AuthService {
+	return &authServiceImpl{log: _log, dbctx: _dbctx}
 }
 
 func (a *authServiceImpl) RegistrationBegin(request models.RegistrationBeginRequest) (bool, error) {
-	return false, errs.ErrNotImplemented
+
+	ctx := context.Background() 
+	queries := database.New(a.dbctx)
+	user, err := queries.CreateUser(ctx, request.Username) // TODO: validation
+
+  if err != nil {
+		a.log.Get().Error("Failed to add user to database", zap.Error(err))
+		return false, errs.ErrServerError
+	}
+	a.log.Get().Info("Registered a new user", zap.String("username", user.Username))
+
+	// TODO: Send verification email
+
+	return true, nil
 }
 
 func (a *authServiceImpl) RegistrationComplete(request models.RegistrationBeginRequest) (*models.RegistrationCompleteResponse, error) {