#477 Change lastlogin column from bigint to timestamp (work in progress)

- Alter column type
- Create migration for MySQL
- Unrelated: move DataSource enum to its own file

src/main/java/fr/xephi/authme/process/login/AsynchronousLogin.java

@@ -63,7 +63,7 @@ public class AsynchronousLogin {
         this.settings = settings;
     }
 
-    protected boolean needsCaptcha() {
+    private boolean needsCaptcha() {
         if (Settings.useCaptcha) {
             if (!plugin.captcha.containsKey(name)) {
                 plugin.captcha.putIfAbsent(name, 1);
@@ -87,7 +87,7 @@ public class AsynchronousLogin {
      *
      * @return PlayerAuth
      */
-    protected PlayerAuth preAuth() {
+    private PlayerAuth preAuth() {
         if (PlayerCache.getInstance().isAuthenticated(name)) {
             m.send(player, MessageKey.ALREADY_LOGGED_IN_ERROR);
             return null;
@@ -153,7 +153,6 @@ public class AsynchronousLogin {
                 .name(name)
                 .realName(realName)
                 .ip(ip)
-                .lastLogin(new Date().getTime())
                 .email(email)
                 .password(pAuth.getPassword())
                 .build();
@@ -221,14 +220,12 @@ public class AsynchronousLogin {
     }
 
     public void displayOtherAccounts(PlayerAuth auth) {
-        if (!Settings.displayOtherAccounts) {
-            return;
-        }
-        if (auth == null) {
+        if (!Settings.displayOtherAccounts || auth == null) {
             return;
         }
+
         List<String> auths = this.database.getAllAuthsByName(auth);
-        if (auths.isEmpty() || auths.size() == 1) {
+        if (auths.size() < 2) {
             return;
         }
         String message = "[AuthMe] " + StringUtils.join(", ", auths) + ".";

src/main/java/fr/xephi/authme/process/register/AsyncRegister.java

@@ -43,7 +43,7 @@ public class AsyncRegister {
         this.settings = settings;
     }
 
-    private boolean preRegisterCheck() throws Exception {
+    private boolean preRegisterCheck() {
         String passLow = password.toLowerCase();
         if (PlayerCache.getInstance().isAuthenticated(name)) {
             m.send(player, MessageKey.ALREADY_LOGGED_IN_ERROR);
@@ -86,18 +86,12 @@ public class AsyncRegister {
     }
 
     public void process() {
-        try {
-            if (!preRegisterCheck()) {
-                return;
-            }
+        if (preRegisterCheck()) {
             if (email != null && !email.isEmpty()) {
                 emailRegister();
             } else {
                 passwordRegister();
             }
-        } catch (Exception e) {
-            ConsoleLogger.logException("Error during async register process", e);
-            m.send(player, MessageKey.ERROR);
         }
     }
 
@@ -130,7 +124,7 @@ public class AsyncRegister {
 
     }
 
-    private void passwordRegister() throws Exception {
+    private void passwordRegister() {
         final HashedPassword hashedPassword = plugin.getPasswordSecurity().computeHash(password, name);
         PlayerAuth auth = PlayerAuth.builder()
             .name(name)