joomla admin: unable to login after module installation

My first message at login was:

"JAuthentication::__construct: Could not load authentication libraries.
Username and password do not match"

Through my CPANEL I went into by phpADMIN then selected the database ending with the _jo151... Yours will have a different number but should end in _jo(something).

Once inside I scrolled down on my left side file menu and selected jos_plugins.

Then I selected the BROWSE tab at the top.

I clicked the edit icon on the Authentication - Joomla column and changed the published to 1

Then I went back out to the BROWSE tab and edited the User - Joomla! and changed the published to 1

I proceeded to try login again and this was the message I recieved:

"Username and password do not match"

Through my CPANEL I went back into by phpADMIN then selected the database ending with the _jo151...

Once inside I scrolled down on my left side file menu and selected jos_users.

Then I selected the BROWSE tab at the top.

I clicked edit icon next to the "login" columns and under the password row I selected MD5 and retyped my password on the right, then select Go on the bottom left.

Everything works as it should now. Obviously you can correct all of this whil you are in your Joomla database with leaving like I did by trial and error.

I am brand new to Joomla and this problem was scary but easy to fix. I hope this helps. ;)