如果您已经有了用户名和密码，就使用这些凭证登录。
If you already have a username and password, use those credentials to log in.
第一个错误ID是用于系统中已经存在一个用户名的情况。
The first error ID is for when a user name already exists in the system.
可以自动检查一个用户名或电子邮件地址是否已经不再使用，验证表单而无需刷新页面，甚至提交表单并动态显示一个结果。
You could automatically check that a user name or email address is not already in use, validate the form without refreshing the page, or even submit the form and display a result dynamically.
如果特定用户名的用户在数据库中已经存在，则一个JSON数据结构将返回给浏览器。
A JSON data structure is returned to the browser if a user with given username already exists in the database.
他们可以假设，只要对应用程序的请求附带一个用户名，身份验证就已经完成了。
They can assume that once a request for an application is accompanied by a username, then authentication has already taken place.
事实上，我依旧过着同样的生活，只做一个自己，只使用用了很久的两个邮箱，而另外一个邮箱我已经完全忘记了用户名或者密码。
In fact, I remained the same person with the same life on the same two e-mail accounts I was already using, and that person couldn’t remember the passwords or user names for the additional ones.
这里，我们首先需要查看提交的用户名是否已经被占用。
From there, you'll first need to check to see whether the proposed username is already taken.
搜索他的姓（已经在GECOS字段中正确地输入了），可以快速地显示他的用户名。
Searching for his last name, which was correctly entered into the GECOS field, would quickly show me his user name.
导航到Registration页面并用任何已经被使用的用户名进行注册，查看相应的错误消息。
Navigate to the Registration page and register with any user name that is already taken to see the appropriate error message.
还指定了JDBC驱动程序类、数据库用户名和连接数据库（在这个数据库中已经创建了users 和usergroup表）所用的 JDBCURL。
I have provided values for the JDBC driver class, the database user name, and a JDBC URL to connect to the database, in which you have already created the users and usergroup tables.
您可以看到您已经定义了默认的匿名角色并将pluto角色映射为用户名system，这是默认的管理员帐户。
You can see that you've defined a default anonymous role and mapped the Pluto role to the user name system, which is the default administrator account.
除了我们已经考虑的两个之外，最常用的是用户名和密码，它们验证您对可能受保护的JNDI存储的访问权限。
The most common ones, aside from the two we've looked at, are the user name and password that authenticate you for access to JNDI stores that may be secure. These parameters are
对于您的应用程序，可能已经存在一个登录页面，使用自己已有的用户名即可。
For your application, you probably already have a login, so you can use your existing user name.
同时还假设已经下载了一个用户名和密码的清单到这个数据库中，并且当用户每次试图登陆到这个应用软件时，这个应用软件都会对它进行验证。
Also assume that a list of user names and passwords are preloaded into the database, and that the application verifies against this data every time a user attempts to log in to the application.
如果响应包含用户数据，则它表示特定用户名称的用户已经存在。
If the response contains the user data, it indicates a user with the given user name already exists.
如果某个用户名已经被使用，而管理员尝试再次输入它，则浏览器会显示一个警告，同时用户名字段将被清空。
If a username has already been used and the administrator tries to enter it again, the browser will display a warning and the username field will be cleared.
检查你通常使用的用户名，如果有的用户名没有让你回忆起来，看看它是不是你的或者是已经被别人占有。
Check any you normally use. If any don't ring any bells, see if it's yours or if somebody already owns.
如果该用户名已经存在，DB 2安装向导就会在默认的名称后面增加一个1- 99的数字，直到遇到一个不存在的用户ID。
If the user name already exists, the DB2 Setup wizard appends a number from 1-99 to the default user name, until a user ID that does not already exist can be created.
此时将弹出一个窗口，警告用户名已经使用并且用户名字段将被清空。
A window will pop up warning that the username has been used and the username field will be cleared.
如您已经看到的，odbc_connect函数接受od bc友好的链接字符串、数据库用户名称和相关密码。
You've already seen that odbc_connect takes in an ODBC-friendly connection string, a database user name, and the relevant password.
在Security页面上，应该已经设置了正确的管理用户名和密码。
On the Security page, the correct admin user name and password should be set.
最有可能的就是你选择了一个别人已经在用的用户名。
Most likely you've picked a username already used by someone else.
但如果你在博客上批评的人是你的老板，或者在未经允许的情况下讨论工作，事情会变得更加严重。 最近令人瞩目的一个例子就是波兹曼市要求应聘者提供社交网站档案的用户名和密码（目前该规定已经取消）。
The slope gets a little more slippery once we start dealing with people who criticize their employer on their blogs... or just discuss their job without permission.
没有重新命名管理员帐户的话，还有恶意的用户已经知道了谜底的一半，他们知道哪个用户名，能够使得他们拥有特权，来编辑文件和数据库。
In that case half the puzzle is already solved for malicious users as they know what username will give them significant privileges to edit files and databases.
一个窗口(右上图)将会出现。输入您的用户名和密码，您应该已经成功地登录。
A window (top right image) will appear. Enter your username and password and you should have successfully logged in.
如果你已经注册，输入用户名和密码进行登录。
If you have registered, enter your user name and password to login.
传统的身份认证只是一种用户名和口令的简单组合，在充满黑客和攻击的网络环境下，这种认证方式已经不能充分保证应用系统的安全。
Traditional ID authentication combines a user name and a password, which is not sufficient enough to assure the security of application systems in an environment full of hackers network attacks.
要注册新的帐户，只要选择的用户名不使用和遵循的情况下服务器的用户名的指示已经存在。
To register a new account, simply chose a username that isn't used and follow the instructions given by the server in case the username already exists.
要注册新的帐户，只要选择的用户名不使用和遵循的情况下服务器的用户名的指示已经存在。
To register a new account, simply chose a username that isn't used and follow the instructions given by the server in case the username already exists.
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