Specific way to allow WordPress users to view their current password? And edit it?

Viewing passwords is not possible, because they are not stored anywhere. WordPress stores just the hash of the password, not the password itself. When a user sends her password to authenticate herself, WordPress creates a hash of the sent password and compares that to the stored hash.

You should not try to store the passwords as plain text anywhere. That would be a huge security problem.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)