Authorize members from the front end of your site with Pic Puller.
As of version 0.9.2, Pic Puller for Instagram allows you to authorize logged in ExpressionEngine site members from the front end of your site. Below is a video walk through on how it works.
Below is the ExpressionEngine code sample reviewed at the end of the video:
{if logged_in}
<p>Since you're logged in, {screen_name} (aka, user #{member_id}), you can authorize the app.</p>
<p>{exp:ig_picpuller:authorization_link fullhtml='yes' authclass='btn primary' authtext='Please Authorize So I Can Pull Pics' deauthclass='btn danger' deauthtext='You may remove your photos by clicking here'}</p>
{/if}