diff --git a/pkg/database/database.go b/pkg/database/database.go
index fc2e5ed..3f739b4 100644
--- a/pkg/database/database.go
+++ b/pkg/database/database.go
@@ -2,7 +2,6 @@ package database
 
 import (
 	"context"
-
 	"git.dragse.it/anthrove/otter-space-sdk/pkg/models"
 )
 
@@ -66,14 +65,16 @@ type OtterSpace interface {
 
 	// GetSourceByDomain retrieves a source by its URL.
 	GetSourceByDomain(ctx context.Context, sourceDomain models.AnthroveSourceDomain) (*models.Source, error)
-	/*
-		CreateTagAlias()
-		DeleteTagAlias()
-		UpdateTagWithAlias()
 
-		CreateTagGroup()
-		DeleteTagGroup()
-		UpdateTagWithGroup()
+	GetAllTagAlias(ctx context.Context) ([]models.TagAlias, error)
+	GetAllTagAliasByTag(ctx context.Context, tagID models.AnthroveTagID) ([]models.TagAlias, error)
+	CreateTagAlias(ctx context.Context, tagAliasName models.AnthroveTagAliasName, tagID models.AnthroveTagID) error
+	DeleteTagAlias(ctx context.Context, tagAliasName models.AnthroveTagAliasName) error
 
-		UpdateUserWithScrapeTimeInterval()*/
+	GetAllTagGroup(ctx context.Context) ([]models.TagGroup, error)
+	GetAllTagGroupByTag(ctx context.Context, tagID models.AnthroveTagID) ([]models.TagGroup, error)
+	CreateTagGroup(ctx context.Context, tagGroupName models.AnthroveTagGroupName, tagID models.AnthroveTagID)
+	DeleteTagGroup(ctx context.Context, tagGroupName models.AnthroveTagGroupName) error
+
+	UpdateUserWithScrapeTimeInterval(ctx context.Context, anthroveUserID models.AnthroveUserID, sourceID models.AnthroveSourceID, scrapeTime models.AnthroveScrapeTimeInterval) error
 }
diff --git a/pkg/database/postgres.go b/pkg/database/postgres.go
index fb53ec9..1770610 100644
--- a/pkg/database/postgres.go
+++ b/pkg/database/postgres.go
@@ -148,6 +148,51 @@ func (p *postgresqlConnection) GetSourceByDomain(ctx context.Context, sourceDoma
 	return postgres.GetSourceByDomain(ctx, p.db, sourceDomain)
 }
 
+func (p *postgresqlConnection) GetAllTagAlias(ctx context.Context) ([]models.TagAlias, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (p *postgresqlConnection) GetAllTagAliasByTag(ctx context.Context, tagID models.AnthroveTagID) ([]models.TagAlias, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (p *postgresqlConnection) CreateTagAlias(ctx context.Context, tagAliasName models.AnthroveTagAliasName, tagID models.AnthroveTagID) error {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (p *postgresqlConnection) DeleteTagAlias(ctx context.Context, tagAliasName models.AnthroveTagAliasName) error {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (p *postgresqlConnection) GetAllTagGroup(ctx context.Context) ([]models.TagGroup, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (p *postgresqlConnection) GetAllTagGroupByTag(ctx context.Context, tagID models.AnthroveTagID) ([]models.TagGroup, error) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (p *postgresqlConnection) CreateTagGroup(ctx context.Context, tagGroupName models.AnthroveTagGroupName, tagID models.AnthroveTagID) {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (p *postgresqlConnection) DeleteTagGroup(ctx context.Context, tagGroupName models.AnthroveTagGroupName) error {
+	//TODO implement me
+	panic("implement me")
+}
+
+func (p *postgresqlConnection) UpdateUserWithScrapeTimeInterval(ctx context.Context, anthroveUserID models.AnthroveUserID, sourceID models.AnthroveSourceID, scrapeTime models.AnthroveScrapeTimeInterval) error {
+	//TODO implement me
+	panic("implement me")
+}
+
 func (p *postgresqlConnection) migrateDatabase(dbPool *gorm.DB) error {
 	dialect := "postgres"
 	migrations := &migrate.EmbedFileSystemMigrationSource{FileSystem: embedMigrations, Root: "migrations"}
diff --git a/pkg/models/const.go b/pkg/models/const.go
index f95434f..13646fe 100644
--- a/pkg/models/const.go
+++ b/pkg/models/const.go
@@ -1,10 +1,16 @@
 package models
 
+import "google.golang.org/genproto/googleapis/type/date"
+
 type AnthroveUserID string
 type AnthrovePostID string
 type AnthroveSourceID string
 type AnthroveSourceDomain string
 type AnthrovePostURL string
+type AnthroveTagGroupName string
+type AnthroveTagAliasName string
+type AnthroveTagID string
+type AnthroveScrapeTimeInterval date.Date
 
 type Rating string
 type TagType string