diff --git a/internal/db/user.go b/internal/db/user.go
index f501924..2804f80 100644
--- a/internal/db/user.go
+++ b/internal/db/user.go
@@ -6,8 +6,6 @@ import (
 
 	"github.com/synctv-org/synctv/internal/model"
 	"github.com/synctv-org/synctv/internal/provider"
-	"github.com/zijiren233/stream"
-	"golang.org/x/crypto/bcrypt"
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
 )
@@ -186,43 +184,6 @@ func LoadAndDeleteUserByID(userID uint, columns ...clause.Column) (*model.User,
 	return u, nil
 }
 
-func DeleteUserByUsername(username string) error {
-	err := db.Unscoped().Where("username = ?", username).Delete(&model.User{}).Error
-	if errors.Is(err, gorm.ErrRecordNotFound) {
-		return errors.New("user not found")
-	}
-	return err
-}
-
-func LoadAndDeleteUserByUsername(username string, columns ...clause.Column) (*model.User, error) {
-	u := &model.User{}
-	err := db.Unscoped().Clauses(clause.Returning{Columns: columns}).Where("username = ?", username).Delete(u).Error
-	if errors.Is(err, gorm.ErrRecordNotFound) {
-		return u, errors.New("user not found")
-	}
-	return u, err
-}
-
-func SetUserPassword(userID uint, password string) error {
-	var hashedPassword []byte
-	if password != "" {
-		var err error
-		hashedPassword, err = bcrypt.GenerateFromPassword(stream.StringToBytes(password), bcrypt.DefaultCost)
-		if err != nil {
-			return err
-		}
-	}
-	return SetUserHashedPassword(userID, hashedPassword)
-}
-
-func SetUserHashedPassword(userID uint, hashedPassword []byte) error {
-	err := db.Model(&model.User{}).Where("id = ?", userID).Update("hashed_password", hashedPassword).Error
-	if errors.Is(err, gorm.ErrRecordNotFound) {
-		return errors.New("user not found")
-	}
-	return err
-}
-
 func SaveUser(u *model.User) error {
 	return db.Save(u).Error
 }
@@ -327,3 +288,11 @@ func GetAllUserWithRoleUserCount(scopes ...func(*gorm.DB) *gorm.DB) int64 {
 	db.Model(&model.User{}).Where("role = ?", model.RoleUser).Scopes(scopes...).Count(&count)
 	return count
 }
+
+func SetUsernameByID(userID uint, username string) error {
+	err := db.Model(&model.User{}).Where("id = ?", userID).Update("username", username).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return errors.New("user not found")
+	}
+	return err
+}
diff --git a/internal/op/user.go b/internal/op/user.go
index 2f5ace4..1e6a489 100644
--- a/internal/op/user.go
+++ b/internal/op/user.go
@@ -66,3 +66,11 @@ func (u *User) SetRole(role model.Role) error {
 	u.Role = role
 	return nil
 }
+
+func (u *User) SetUsername(username string) error {
+	if err := db.SetUsernameByID(u.ID, username); err != nil {
+		return err
+	}
+	u.Username = username
+	return nil
+}
diff --git a/server/handlers/init.go b/server/handlers/init.go
index c2f4d83..68f15a4 100644
--- a/server/handlers/init.go
+++ b/server/handlers/init.go
@@ -128,6 +128,8 @@ func Init(e *gin.Engine) {
 			needAuthUser.GET("/me", Me)
 
 			needAuthUser.GET("/rooms", UserRooms)
+
+			needAuthUser.POST("/username", SetUsername)
 		}
 	}
 }
diff --git a/server/handlers/user.go b/server/handlers/user.go
index ddb5aab..5867f3b 100644
--- a/server/handlers/user.go
+++ b/server/handlers/user.go
@@ -108,3 +108,21 @@ func UserRooms(ctx *gin.Context) {
 		"list":  genRoomListResp(append(scopes, db.Paginate(page, pageSize))...),
 	}))
 }
+
+func SetUsername(ctx *gin.Context) {
+	user := ctx.MustGet("user").(*op.User)
+
+	var req model.SetUsernameReq
+	if err := model.Decode(ctx, &req); err != nil {
+		ctx.AbortWithStatusJSON(http.StatusBadRequest, model.NewApiErrorResp(err))
+		return
+	}
+
+	err := user.SetUsername(req.Username)
+	if err != nil {
+		ctx.AbortWithStatusJSON(http.StatusInternalServerError, model.NewApiErrorResp(err))
+		return
+	}
+
+	ctx.Status(http.StatusNoContent)
+}
diff --git a/server/model/user.go b/server/model/user.go
index ab36f89..5fc1ded 100644
--- a/server/model/user.go
+++ b/server/model/user.go
@@ -51,37 +51,28 @@ func (l *LoginUserReq) Validate() error {
 	return nil
 }
 
-type SignupUserReq struct {
-	Username string `json:"username"`
-	Password string `json:"password"`
+type UserInfoResp struct {
+	ID        uint         `json:"id"`
+	Username  string       `json:"username"`
+	Role      dbModel.Role `json:"role"`
+	CreatedAt int64        `json:"createdAt"`
 }
 
-func (s *SignupUserReq) Decode(ctx *gin.Context) error {
-	return json.NewDecoder(ctx.Request.Body).Decode(s)
+type SetUsernameReq struct {
+	Username string `json:"username"`
 }
 
-func (s *SignupUserReq) Validate() error {
+func (s *SetUsernameReq) Validate() error {
 	if s.Username == "" {
 		return errors.New("username is empty")
 	} else if len(s.Username) > 32 {
 		return ErrUsernameTooLong
-	} else if !alnumPrintHanReg.MatchString(s.Username) {
+	} else if !alnumPrintReg.MatchString(s.Username) {
 		return ErrUsernameHasInvalidChar
 	}
-
-	if s.Password == "" {
-		return FormatEmptyPasswordError("user")
-	} else if len(s.Password) > 32 {
-		return ErrPasswordTooLong
-	} else if !alnumPrintReg.MatchString(s.Password) {
-		return ErrPasswordHasInvalidChar
-	}
 	return nil
 }
 
-type UserInfoResp struct {
-	ID        uint         `json:"id"`
-	Username  string       `json:"username"`
-	Role      dbModel.Role `json:"role"`
-	CreatedAt int64        `json:"createdAt"`
+func (s *SetUsernameReq) Decode(ctx *gin.Context) error {
+	return json.NewDecoder(ctx.Request.Body).Decode(s)
 }