How to make it so that if the user writes a nickname but does not indicate the desired nickname, then the bot will answer him in the next sentence, write the desired nickname.?

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How to make it so that if the user writes a nickname but does not indicate the desired nickname, then the bot will answer him in the next sentence, write the desired nickname. The bot waits for a message and changes the player's nickname to the one that he wrote?

Answer 1

Catch the moment when the user needs to write a nickname, if the string with the nickname

if(nickname.length) {
//логика бота
}