public String getOAuth2GrantType() {
        return this.oAuth2GrantType;
    }
<p>
The OAuth2 grant type in the CreateConnection request. For example, <code>AUTHORIZATION_CODE</code>,
<code>JWT_BEARER</code>, or <code>CLIENT_CREDENTIALS</code>.
</p>

@return The OAuth2 grant type in the CreateConnection request. For example, <code>AUTHORIZATION_CODE</code>,
        <code>JWT_BEARER</code>, or <code>CLIENT_CREDENTIALS</code>.
@see OAuth2GrantType
aws-java-sdk-glue/src/main/java/com/amazonaws/services/glue/model/OAuth2PropertiesInput.java