Username:the literal text Username: (case sensitive) \s*any whitespace character, repeated any number of times
.+any character (except for line terminators), repeated at least once
\na line-feed (newline) character (ASCII 10)
Password:the literal text Password: (case sensitive) \s*any whitespace character, repeated any number of times
.+any character (except for line terminators), repeated at least once
g modifier: global. Finds all matches instead of stopping after the first