[BUG] User not found error for valid user

[philip-ulrich]

ref: https://discordapp.com/channels/738695604955250739/738716066326511629/752846235593080842

Error: Cannot find user @[username], abort.

When using --old mode, the search page can load slowly enough that the script thinks there is no user found. This can be fixed by adding a random sleep there. In fact, there are quite a few areas where if your connection or device is slow enough, it can error out - that is a more difficult problem to solve though.

Will throw in a quick PR to fix this.