Greeting The User

Python 2, 54 bytes

print(")-*-*-*^_^*-*-*-(\n| Welcome User! |\n"*2)[:53]

Try it online!

T-SQL, 60 bytes

PRINT')-*-*-*^_^*-*-*-(
| Welcome User! |
)-*-*-*^_^*-*-*-('

SQL allows splitting string literals over lines, so those returns are counted.

Working on a procedural solution, but doubt I'll find one under 60.

New Edit: Found a simple REPLACE that ties the trivial solution:

PRINT REPLACE('1
| Welcome User! |
1',1,')-*-*-*^_^*-*-*-(')

Turns out that REPLACE will do an implicit conversion of a numeral to a string, so this lets me save 2 characters by eliminating the quotes around my replacement character.

Trying to put it into a variable is too long, due to the overhead of the DECLARE (69 bytes):

DECLARE @ CHAR(17)=')-*-*-*^_^*-*-*-('PRINT @+'
| Welcome User! |
'+@

Python 2.7, 55 bytes

a="\n)-*-*-*^_^*-*-*-(\n"
print a+'| Welcome User! |'+a

Pretty simple. Includes leading and trailing newlines.