The Flyp crosslister is a secure and quick way to connect to your online selling accounts. It does not require you to share any sensitive information at all, and no passwords or logins are required to connect your Poshmark, Mercari, Depop, FB Marketplace, Etsy, or eBay accounts.
When you first open the tool, it will prompt you to install the chrome extensions, then connect your marketplace accounts.
On the "Account Connections" page, found in the "Settings" drop-down menu, tap "Connect" next to each marketplace. If you're already logged in your marketplaces in separate tabs, it will connect automatically. Otherwise, a popup will appear for you to log in to your marketplace account.
*** Note: You'll need a fully verified account on each platform in order to list or share using Reseller Tools.