Not able to connect mysql database

Hi Team,

Can you please tell me how to connect mysql database. I run this query and get the below error can you please help.

[senjoydeep_cca175@gw03 hw1]$ mysql -h -u retail_user
ERROR 1045 (28000): Access denied for user ‘retail_user’@‘’ (using password: NO)


Please refer this topic How to access MySQL in Big data labs?