feat: delete user (#15)

Signed-off-by: Ben <ben@tickets.bot>

Author: BenHall-1

cache/pgcache.go

@@ -48,6 +48,8 @@ var (
 	queryGetUser string
 	//go:embed sql/get_users.sql
 	queryGetUsers string
+	//go:embed sql/delete_user.sql
+	queryDeleteUser string
 
 	//go:embed sql/insert_guild.sql
 	queryInsertGuild string
@@ -230,6 +232,11 @@ func (c *PgCache) GetUsers(ctx context.Context, ids []uint64) (map[uint64]user.U
 	return users, nil
 }
 
+func (c *PgCache) DeleteUser(ctx context.Context, userId uint64) error {
+	_, err := c.Exec(ctx, queryDeleteUser, userId)
+	return err
+}
+
 func (c *PgCache) StoreGuilds(ctx context.Context, guilds []guild.Guild) error {
 	if !c.options.Guilds {
 		return nil

cache/sql/delete_user.sql

@@ -0,0 +1 @@
+DELETE FROM users WHERE "user_id" = $1;