diff --git a/dbhandler/mongo/user_pass_authentication.go b/dbhandler/mongo/user_pass_authentication.go
index 304c082..55eced6 100644
--- a/dbhandler/mongo/user_pass_authentication.go
+++ b/dbhandler/mongo/user_pass_authentication.go
@@ -25,8 +25,8 @@ type UserPassAuthenticationDbHandler struct {
 	collection *mongo.Collection
 }
 
-func (self *UserPassAuthenticationDbHandler) ListUsers(ctx context.Context) ([]models.User, error) {
-	cursor, err := self.collection.Find(ctx, bson.M{})
+func (i *UserPassAuthenticationDbHandler) ListUsers(ctx context.Context) ([]models.User, error) {
+	cursor, err := i.collection.Find(ctx, bson.M{})
 	if err != nil {
 		return nil, err
 	}
@@ -49,9 +49,9 @@ func (self *UserPassAuthenticationDbHandler) ListUsers(ctx context.Context) ([]m
 	return modelUsers, nil
 }
 
-func (self *UserPassAuthenticationDbHandler) AuthenticateUser(ctx context.Context, username string, password string) (*models.User, error) {
+func (i *UserPassAuthenticationDbHandler) AuthenticateUser(ctx context.Context, username string, password string) (*models.User, error) {
 	var user AuthUser
-	err := self.collection.FindOne(ctx, bson.M{"username": username}).Decode(&user)
+	err := i.collection.FindOne(ctx, bson.M{"username": username}).Decode(&user)
 	if err != nil {
 		return nil, err
 	}
@@ -70,7 +70,7 @@ func (self *UserPassAuthenticationDbHandler) AuthenticateUser(ctx context.Contex
 	}, nil
 }
 
-func (self *UserPassAuthenticationDbHandler) CreateUser(
+func (i *UserPassAuthenticationDbHandler) CreateUser(
 	ctx context.Context,
 	username string,
 	password string,
@@ -83,7 +83,7 @@ func (self *UserPassAuthenticationDbHandler) CreateUser(
 		return err
 	}
 
-	_, err = self.collection.InsertOne(ctx, &AuthUser{
+	_, err = i.collection.InsertOne(ctx, &AuthUser{
 		Username:       username,
 		HashedPassword: hashedPassword,
 		Permissions:    permissions,
@@ -94,16 +94,16 @@ func (self *UserPassAuthenticationDbHandler) CreateUser(
 	return err
 }
 
-func (self *UserPassAuthenticationDbHandler) CountUsers(ctx context.Context) (uint, error) {
-	count, err := self.collection.CountDocuments(ctx, bson.M{})
+func (i *UserPassAuthenticationDbHandler) CountUsers(ctx context.Context) (uint, error) {
+	count, err := i.collection.CountDocuments(ctx, bson.M{})
 	if err != nil {
 		return 0, err
 	}
 	return uint(count), nil
 }
 
-func (self *UserPassAuthenticationDbHandler) RemoveUser(ctx context.Context, username string) error {
-	_, err := self.collection.DeleteOne(
+func (i *UserPassAuthenticationDbHandler) RemoveUser(ctx context.Context, username string) error {
+	_, err := i.collection.DeleteOne(
 		ctx,
 		bson.M{
 			"username": username,
@@ -113,12 +113,12 @@ func (self *UserPassAuthenticationDbHandler) RemoveUser(ctx context.Context, use
 	return err
 }
 
-func (self *UserPassAuthenticationDbHandler) SetPermissions(
+func (i *UserPassAuthenticationDbHandler) SetPermissions(
 	ctx context.Context,
 	username string,
 	permissions models.Permission,
 ) error {
-	_, err := self.collection.UpdateOne(
+	_, err := i.collection.UpdateOne(
 		ctx,
 		bson.M{
 			"username": username,
@@ -155,10 +155,10 @@ type InviteTokenDbHandler struct {
 	collection *mongo.Collection
 }
 
-func (self *ServersDbHandler) SaveInviteToken(ctx context.Context, email string, permissions models.Permission) (string, error) {
+func (i *InviteTokenDbHandler) SaveInviteToken(ctx context.Context, email string, permissions models.Permission) (string, error) {
 	token := uuid.NewString()
 
-	_, err := self.collection.InsertOne(ctx, &InviteToken{
+	_, err := i.collection.InsertOne(ctx, &InviteToken{
 		Permissions: permissions,
 		Email:       email,
 		Token:       token,
@@ -170,9 +170,9 @@ func (self *ServersDbHandler) SaveInviteToken(ctx context.Context, email string,
 	return token, nil
 }
 
-func (self *ServersDbHandler) GetInviteToken(ctx context.Context, token string) (*dbhandler.InviteToken, error) {
+func (i *InviteTokenDbHandler) GetInviteToken(ctx context.Context, token string) (*dbhandler.InviteToken, error) {
 	var inviteToken InviteToken
-	err := self.collection.FindOne(ctx, bson.M{"token": token}).Decode(&inviteToken)
+	err := i.collection.FindOne(ctx, bson.M{"token": token}).Decode(&inviteToken)
 	if err != nil {
 		return nil, err
 	}