I changed my password for yahoo and how do I reprogram it in message on my iphone?

I changed password on my yahoo account.

Therefore when I am using "message" on my iphone it says something like "impossible to connect to the server"

Which is right since? changed my yahoo password using my PC.

Now, the question is, what do I have to do in order to allow "message" on my iphone to get my yahoo messages like it use to get them before the change of password?

?

Thanks a lot!!!!!?

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