how to do slopes with move and slide

Godot Version

GODOT 3.2.3 (or any version of GODOT 3 [NOT 4]

Question

in my player script (GODOT 3.) i have

velocity = move_and_slide(velocity, Vector2.UP)

what I would like is to create a tile map with slops and have the player move correctly on them any help please and thank you