doc(user): 更新数据库脚本User表UserName列设置为16

DatabaseScripts/Install.sql

@@ -17,7 +17,7 @@ SET ANSI_PADDING ON
 GO
 CREATE TABLE [dbo].[Users](
 	[ID] [int] IDENTITY(1,1) NOT NULL,
-	[UserName] [varchar](50) NOT NULL,
+	[UserName] [varchar](16) NOT NULL,
 	[Password] [varchar](50) NOT NULL,
 	[PassSalt] [varchar](50) NOT NULL,
 	[DisplayName] [nvarchar](50) NOT NULL,

DatabaseScripts/MySQL/install.sql

@@ -1,6 +1,6 @@
 CREATE TABLE Users (
     ID             INTEGER       PRIMARY KEY	Auto_increment,
-    UserName       NVARCHAR (50) NOT NULL,
+    UserName       NVARCHAR (16) NOT NULL,
     Password       VARCHAR (50)  NOT NULL,
     PassSalt       VARCHAR (50)  NOT NULL,
     DisplayName    VARCHAR (50)  NOT NULL,

DatabaseScripts/Postgresql/install.sql

@@ -1,6 +1,6 @@
 CREATE TABLE Users (
     ID             SERIAL PRIMARY KEY,
-    UserName       VARCHAR (50) NOT NULL,
+    UserName       VARCHAR (16) NOT NULL,
     Password       VARCHAR (50)  NOT NULL,
     PassSalt       VARCHAR (50)  NOT NULL,
     DisplayName    VARCHAR (50)  NOT NULL,

DatabaseScripts/SQLite/Install.sql

@@ -1,6 +1,6 @@
 CREATE TABLE Users (
     ID             INTEGER       PRIMARY KEY,
-    UserName       NVARCHAR (50) NOT NULL COLLATE NOCASE,
+    UserName       NVARCHAR (16) NOT NULL COLLATE NOCASE,
     Password       VARCHAR (50)  NOT NULL,
     PassSalt       VARCHAR (50)  NOT NULL,
     DisplayName    VARCHAR (50)  NOT NULL,