Update broken links in the Readme (#50)

Author: tymscar

01-Login/README.md

@@ -27,12 +27,12 @@ Run `go run main.go` to start the app and navigate to [http://localhost:3000/](h
 
 Auth0 helps you to:
 
-* Add authentication with [multiple authentication sources](https://docs.auth0.com/identityproviders), either social like **Google, Facebook, Microsoft Account, LinkedIn, GitHub, Twitter, Box, Salesforce, amont others**, or enterprise identity systems like **Windows Azure AD, Google Apps, Active Directory, ADFS or any SAML Identity Provider**.
-* Add authentication through more traditional **[username/password databases](https://docs.auth0.com/mysql-connection-tutorial)**.
-* Add support for **[linking different user accounts](https://docs.auth0.com/link-accounts)** with the same user.
-* Support for generating signed [Json Web Tokens](https://docs.auth0.com/jwt) to call your APIs and **flow the user identity** securely.
+* Add authentication with [multiple authentication sources](https://auth0.com/docs/authenticate/identity-providers), either social like **Google, Facebook, Microsoft Account, LinkedIn, GitHub, Twitter, Box, Salesforce, amont others**, or enterprise identity systems like **Windows Azure AD, Google Apps, Active Directory, ADFS or any SAML Identity Provider**.
+* Add authentication through more traditional **[username/password databases](https://auth0.com/docs/authenticate/database-connections/custom-db/create-db-connection)**.
+* Add support for **[linking different user accounts](https://auth0.com/docs/manage-users/user-accounts/user-account-linking/link-user-accounts)** with the same user.
+* Support for generating signed [Json Web Tokens](https://auth0.com/docs/secure/tokens/json-web-tokens) to call your APIs and **flow the user identity** securely.
 * Analytics of how, when and where users are logging in.
-* Pull data from other sources and add it to the user profile, through [JavaScript rules](https://docs.auth0.com/rules).
+* Pull data from other sources and add it to the user profile, through [JavaScript rules](https://auth0.com/docs/customize/rules).
 
 ## Create a free Auth0 account