How to call a function from a model in a Joomla component?

Question

Joomla

I'm trying to deal with mvc joomla 2.5.
The site has a slogin component that registers and authorizes users from social networks. networks.
Their avatars are saved to the avatar folder, written to the plg_slogin_profile.avatar table
And for users who register as standard, the avatars are saved to the avatar S
folder, and the user_profile.avatar table from plugin table to user table.
I previously wrote the function itself in the model (for now, just writing the avatar from the plugin to the standard table), but I can’t figure out how to call it.
Model - prntscr.com/awpn5l
Controller - prntscr.com/awpnfk
I want to run the function when it hits the cabinet