For more information on Cookies vs Tokens:
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"Cookies vs Tokens. Getting auth right with Angular.JS.
https://auth0.com/blog/2014/01/07/angularjs-authentication-with-cookies-vs-token/
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"10 Things You Should Know About Tokens"
https://auth0.com/blog/2014/01/27/ten-things-you-should-know-about-tokens-and-cookies/
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"AngularJS Security Fundamentals" Pluralsight course by Troy Hunt.