# How to insert a keyframe for Mask Point coordinates

I'm currently writing an Add-on for Blender 2.8 where I need to change the coordinates of the MaskSplinePoints in the Movie Clip Editor with python. During the script I'm moving along the time line and I want to save the coordinates and handle positions for each point in my mask at every time step. Since MaskSplinePoint inherits bpy_struct.keyframe_insert I thought that I could insert a keyframe for each point with the data_path co, handle_left and handle_right but I'm getting an error I don't know how to handle: TypeError: bpy_struct.keyframe_insert() could not make path to "co"

My code is executed in def execute of an operator:

def execute(self, context):
##################
# in this space I calculate and change the positions for the points
# Note: I'm also adding/removing points from points
##################
# insert keyframe
for p in points:
p.keyframe_insert(data_path="co")
return {'FINISHED'}


Am I doing something wrong? Is there another way to save the state of the mask in time?