I need to replace Bearer from the header to verify the Token

if bearerHeader is something like "Bearer 456513" then your code

bearerHeader.replace("Bearer","");

will result: " 456513" (there are space before the token)

bearerHeader.replace('Bearer ',''); 

may solve your issue but I recommend to verify the authentification scheme first ("Bearer" term is really "Bearer"):

 var parts = bearerHeader.split(' ');
 if (parts.length === 2) {
   var scheme = parts[0];
   var credentials = parts[1];

   if (/^Bearer$/i.test(scheme)) {
     token = credentials;
     //verify token
     jwt.verify(token, 'super secret', function(err, decoded) {
     }
   }
}

You can try to split() the string on spaces and discard the first element

// OPTION 1
bearerHeader.split(" ")[1];

or you can simple cut Bearer from the string

// OPTION 2
bearerHeader.replace("Bearer", "");

Try this

bearer = bearerHeader.replace(/^Bearer\s/, '');
    jwt.verify(bearer, 'super_secret', function (err, decoded) {
                        console.log(err);
                        console.log(decoded);`
    }