Untitled

<!DOCTYPE html>
<html lang="pt-br">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>FindProfessionals</title>
    <script src="https://www.gstatic.com/firebasejs/5.7.0/firebase.js"></script>
<script>
  // Initialize Firebase
  var config = {
    apiKey: "AIzaSyCCDh8XA_LXZA5mvq5ffmJWxc2o6fG8THQ",
    authDomain: "findprofessionals-63377.firebaseapp.com",
    databaseURL: "https://findprofessionals-63377.firebaseio.com",
    projectId: "findprofessionals-63377",
    storageBucket: "findprofessionals-63377.appspot.com",
    messagingSenderId: "281081068714"
  };
  firebase.initializeApp(config);
</script>
</head>
<body>

  <p>cadastro</p>

  <input type="email" name="email" id="e" required>
  <input type="password" name="password" id="p" required>
  <button onclick="cadastro();">cadastrar</button>

  <p>login</p>

  <input type="email" name="email" id="eL" required>
  <input type="password" name="password" id="pL" required>
  <button onclick="login();">Acessar</button>

  <button onclick="logout();">Logout</button>

  <p>insercao de dados</p>

  <button onclick="recuperarDados('dawid');">listar</button>


  <script>

    function login(){
      firebase.auth().signInWithEmailAndPassword(document.getElementById('eL').value.toString(), document.getElementById('pL').value.toString()).catch(function(error) {
        // Handle Errors here.
        var errorCode = error.code;
        var errorMessage = error.message;
        // ...
      });
    }

    function insercao(userID,username,prof,tel){
      firebase.database().ref('users/'+userID).set({
      "name": `${username}`,
      "prof": `${prof}`,
      "tel" : `${tel}`
      }, function(error) {
      if (error) {
        // The write failed...
        alert('falhou!')
      } else {
        // Data saved successfully!
        alert('inserido!')
      }
      });
    }

    function recuperarDados(userID){
      var dados = firebase.database().ref('users/' + userID);
      dados.on('value', function(snapshot) {
        document.write(snapshot.val().name);
        document.write(snapshot.val().tel);
        document.write(snapshot.val().prof);
      });
    }

    function cadastro(){
      firebase.auth().createUserWithEmailAndPassword(document.getElementById('e').value.toString(), document.getElementById('p').value.toString()).catch(function(error) {
        var errorCode = error.code;
        var errorMessage = error.message;

      });
    }

    function verificarLog(){
      firebase.auth().onAuthStateChanged(function(user) {
        if (user) {
          alert('logado')
        } else {
          // No user is signed in.
          alert('n logado')
        }
      });
    }

    function logout(){
      firebase.auth().signOut().then(function() {
        alert('tchau')
      }).catch(function(error) {
        alert(error.message)
      });
    }

  </script>


</body>
</html>