connect spotify

Simplest option is to give the new network the same SSID/password as your previous router.

According to your profile, you have Play:1s and Play:3s. If you don’t follow the above, or use a wired setup, then you would need to factory reset the devices to join a new Wi-Fi network.

https://support.sonos.com/en-gb/article/connect-sonos-to-a-new-router-or-wi-fi-network

Once you do a factory reset (not something to do unless it is directed by support) you have to reconnect and authorize all your services.

A reset deletes any and all settings and information stored on the speaker.  

You guys are funny.

Resetting the app is not the same as a factory reset.

Not like the support article I linked didn’t provide information on what happens with a factory reset.

Good point, went back and added "factory" to my post.

Still thinking that was what was done. I've reset my app, removed and reinstalled it, added it to a new device, all without disrupting my services as that information is stored on the devices, not the app.

Yes, but as the OP has changed their router, the reset app is not going to connect to their existing system over the new Wi-Fi network, or be discovered when using a Spotify Connect until they connect their Sonos devices to the new router.