Update README.md

Author: app-generator

README.md

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 # Nodejs API Server PRO
 
 Express / Nodejs Starter with JWT authentication, and **SQLite** or **MongoDB** persistance - Provided by **AppSeed** [App Generator](https://appseed.us/app-generator).
-Authentication Flow uses [json web tokens](https://jwt.io) via Passport library - `passport-jwt`.
+Authentication flow uses [json web tokens](https://jwt.io) via Passport library - `passport-jwt`.
 
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