Documentation typos (#575)

Am I misreading this?  These changes should make the parameter to attribute mapping less ambiguous...

www/docs/configuration/databases.md

@@ -27,7 +27,7 @@ You can specify database credentials as as a connection string or a [TypeORM con
 The following approaches are exactly equivalent:
 
 ```js
-database: 'mysql://username:password@127.0.0.1:3306/database_name'
+database: 'mysql://nextauth:password@127.0.0.1:3306/database_name'
 ```
 
 ```js
@@ -37,7 +37,7 @@ database: {
   port: 3306,
   username: 'nextauth',
   password: 'password',
-  database: 'nextauth'
+  database: 'database_name'
 }
 ```
 
@@ -47,7 +47,7 @@ You can pass in any valid [TypeORM configuration option](https://github.com/type
 *e.g. To set a prefix for all table names you can use the **entityPrefix** option as connection string parameter:*
 
 ```js
-'mysql://username:password@127.0.0.1:3306/database_name?entityPrefix=nextauth_'
+'mysql://nextauth:password@127.0.0.1:3306/database_name?entityPrefix=nextauth_'
 ```
 
 *…or as a database configuration object:*
@@ -59,7 +59,7 @@ database: {
   port: 3306,
   username: 'nextauth',
   password: 'password',
-  database: 'nextauth'
+  database: 'database_name'
   entityPrefix: 'nextauth_'
 }
 ```
@@ -81,7 +81,7 @@ _If you are running SQLite, MongoDB or a Document database you can skip this ste
 Alternatively, you can also have your database configured automatically using the `synchronize: true` option:
 
 ```js
-database: 'mysql://username:password@127.0.0.1:3306/database_name?synchronize=true'
+database: 'mysql://nextauth:password@127.0.0.1:3306/database_name?synchronize=true'
 ```
 
 ```js
@@ -91,7 +91,7 @@ database: {
   port: 3306,
   username: 'nextauth',
   password: 'password',
-  database: 'nextauth',
+  database: 'database_name',
   synchronize: true
 }
 ```