Error:
mysqldump myuser_db > myuser_db.sql
mysqldump: Got error: 1449: “The user specified as a definer (‘user_db’@’localhost’) does not exist” when using LOCK TABLES
To pass this error try to use –single-transaction
mysqldump --single-transaction myuser_db > myuser_db.sql
Should be good now
Source: https://stackoverflow.com/questions/26583103/mysqldump-got-error-1449/26583311