Results 39 issues of Tibo

We should store as many information as possible on where a user is logging in from. Those should be stored with the auth tokens. We also need an API endpoint...

**Describe the bug** Currently, exchanges transactions are supported in 1.3, but consumptions aren't allowing them.

kind/bug :warning:
s2/wip :construction:

A new setting can be added to define an expiration timer for auth tokens to get rid of idle sessions.

s2/wip :construction:

kind/enhancement :rocket:
p2/normal
flag/ethereum integration
location/admin panel

As discussed in this [PR](https://github.com/omisego/elixir-omg/pull/1416#discussion_r396298467), it appears we could move the validation for sending an empty list of payments to the `/transaction.create` endpoint to an earlier step, so that it...

good first issue
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