Link:the literal text Link: (case sensitive) \h*any horizontal whitespace character, repeated any number of times
\S+any character that is not Unicode whitespace, repeated at least once
\h+any horizontal whitespace character, repeated at least once
Password:the literal text Password: (case sensitive) \h*any horizontal whitespace character, repeated any number of times
\S+any character that is not Unicode whitespace, repeated at least once
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string
u modifier: unicode. Treats the pattern and subject as UTF-16