Investigate login options

[jensren]

What: we want to add a sign-in process. This task is to investigate the different options:

• Implementing our own sign-in (users create an account at our website and sign in with this account)
• Using another company to sign in (e.g. Google, Facebook, WhatsApp, or other popular options)
• Signing in by receiving a code on their phone and entering this code

We will most likely offer two or three of these options.

Why: we want to balance making development easy and making sign-in easy, so if an option is difficult we may decide it doesn't provide enough value to the user to justify developing it (at least, for MVP). We will also use the research here to implement the options we pick.

How: things to look into for each option:

• How do we implement it? (No need to set up a demo unless you want to, this is more about what the steps are)
• How easy is it to implement?
• Is it free for us to use this sign-in method? Are there any limitations to how many users can sign in per day/month when using the free option?

Additionally, if you find another popular option, feel free to propose it.

[jensren]

Determined we will start with Google for now, since it's sufficient to just have Google + our own login for MVP