lost iphone. received a message with location

This is a scam. Under no circumstances should you enter your Apple ID info. Sometimes the scammers even try to call you while impersonating an Apple employee. Do not fall for this. If your iPhone was stolen, you will not get it back. Erase your phone and put it in Lost mode in the Find My app.

The chance the location that you were given in the message is slim. The chances of getting your phone back are even less. If you had Find My iPhone active when it was lost and you did not provide any information in the message, leave it that way. Then they cannot activate the device.

See if the following support article can help: If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

A message with information about the location of your iPhone is a scam. Apple does not do iPhone tracking. If you clicked on anything in the message or logged into your Apple ID from there, you have compromised your Apple ID. That would allow the thief, who sent the message, the ability to erase your device and use it.

I don't know where you're from. I'm from Mexico, I was robbed and my iPhone was stolen more than a month ago. To this day, I still get messages exactly like the ones you are receiving. Maybe police could help, maybe not. In my case, they didn't help at all. Chances are you are not getting it back, ever. Sorry, I hate to be the one giving the bad news :/

Did you have "Find My" enabled on your iPhone BEFORE you lost it? If so, did you take the steps to mark it as lost? If so, that would have provided you the opportunity to include your contact information that would be displayed on this device. You could have also provided information on how the finder could contact you should they find it. Did you do that?