LastPass - How Do I Add a Password or a Secret to LastPass?
There are multiple ways to store passwords and secrets within LastPass
You can add a new username and password while logging in to a website, by saving manually using the browser extension, or by adding passwords directly from within your Vault. You can store an unlimited number of password entries in your LastPass Enterprise or LastPass Premium Vault. LogMeIn offers step-by-step instructions for adding credentials to your Vault on their support page.