public String getDbUser() {
        return this.dbUser;
    }
<p>
The name of a database user. If a user name matching <code>DbUser</code> exists in the database, the temporary
user credentials have the same permissions as the existing user. If <code>DbUser</code> doesn't exist in the
database and <code>Autocreate</code> is <code>True</code>, a new user is created using the value for
<code>DbUser</code> with PUBLIC permissions. If a database user matching the value for <code>DbUser</code>
doesn't exist and <code>Autocreate</code> is <code>False</code>, then the command succeeds but the connection
attempt will fail because the user doesn't exist in the database.
</p>
<p>
For more information, see <a href="https://docs.aws.amazon.com/redshift/latest/dg/r_CREATE_USER.html">CREATE
USER</a> in the Amazon Redshift Database Developer Guide.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must be 1 to 64 alphanumeric characters or hyphens. The user name can't be <code>PUBLIC</code>.
</p>
</li>
<li>
<p>
Must contain uppercase or lowercase letters, numbers, underscore, plus sign, period (dot), at symbol (@), or
hyphen.
</p>
</li>
<li>
<p>
First character must be a letter.
</p>
</li>
<li>
<p>
Must not contain a colon ( : ) or slash ( / ).
</p>
</li>
<li>
<p>
Cannot be a reserved word. A list of reserved words can be found in <a
href="http://docs.aws.amazon.com/redshift/latest/dg/r_pg_keywords.html">Reserved Words</a> in the Amazon Redshift
Database Developer Guide.
</p>
</li>
</ul>

@return The name of a database user. If a user name matching <code>DbUser</code> exists in the database, the
        temporary user credentials have the same permissions as the existing user. If <code>DbUser</code> doesn't
        exist in the database and <code>Autocreate</code> is <code>True</code>, a new user is created using the
        value for <code>DbUser</code> with PUBLIC permissions. If a database user matching the value for
        <code>DbUser</code> doesn't exist and <code>Autocreate</code> is <code>False</code>, then the command
        succeeds but the connection attempt will fail because the user doesn't exist in the database.</p>
        <p>
        For more information, see <a
        href="https://docs.aws.amazon.com/redshift/latest/dg/r_CREATE_USER.html">CREATE USER</a> in the Amazon
        Redshift Database Developer Guide.
        </p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        Must be 1 to 64 alphanumeric characters or hyphens. The user name can't be <code>PUBLIC</code>.
        </p>
        </li>
        <li>
        <p>
        Must contain uppercase or lowercase letters, numbers, underscore, plus sign, period (dot), at symbol (@),
        or hyphen.
        </p>
        </li>
        <li>
        <p>
        First character must be a letter.
        </p>
        </li>
        <li>
        <p>
        Must not contain a colon ( : ) or slash ( / ).
        </p>
        </li>
        <li>
        <p>
        Cannot be a reserved word. A list of reserved words can be found in <a
        href="http://docs.aws.amazon.com/redshift/latest/dg/r_pg_keywords.html">Reserved Words</a> in the Amazon
        Redshift Database Developer Guide.
        </p>
        </li>
aws-java-sdk-redshift/src/main/java/com/amazonaws/services/redshift/model/GetClusterCredentialsRequest.java