Grails 2 - Cannot create spring security domain object

I have installed the spring security app from th grails plugin page after running grails s2-quickstart com.testApplication.secureApplication User Role to autogenerate the domain object I did grails run-app and got this exception:

|Loading Grails 2.3.4
|Configuring classpath
.
|Environment set to development
.................................
|Packaging Grails application
Precompiling AST Transformations ...
src C:\Users\GrailsWorkspace\testApplication\target\work\plugins\postgresql-extensions-0.6.1 C:\Users\GrailsWorkspace\testApplication\target\classes
Done precompiling AST Transformations!
..
|Compiling 3 source files
...................................................
|Running Grails application
Configuring Spring Security Core ...
... finished configuring Spring Security Core
Error |
2013-12-15 15:42:45,635 [localhost-startStop-1] ERROR hbm2ddl.SchemaExport  - Unsuccessful: create table user (id int8 not null, version int8 not null, account_expired bool not null, account_locked bool not null, enabled bool not null, "password" varchar(255) not null, password_expired bool not null, username varchar(255) not null unique, primary key (id))
Error |
2013-12-15 15:42:45,638 [localhost-startStop-1] ERROR hbm2ddl.SchemaExport  - ERROR: syntax error at "user"
  Position: 14
Error |
2013-12-15 15:42:45,688 [localhost-startStop-1] ERROR hbm2ddl.SchemaExport  - Unsuccessful: alter table user_role add constraint FK143BF46A1E03E05D foreign key (user_id) references user
Error |
2013-12-15 15:42:45,688 [localhost-startStop-1] ERROR hbm2ddl.SchemaExport  - ERROR: syntax error at "user"
  Position: 90
|Server running. 

The thing is my database is correctly configured, because I get the table role and user_role. However user does not get generate in my postgresql db. My implementation of my autogenerated user domain object looks like that:

class User {

    transient springSecurityService

    String username
    String password
    boolean enabled = true
    boolean accountExpired
    boolean accountLocked
    boolean passwordExpired

    static transients = ['springSecurityService']

    static constraints = {
        username blank: false, unique: true
        password blank: false
    }

    static mapping = {
        password column: '`password`'
    }

    Set<Role> getAuthorities() {
        UserRole.findAllByUser(this).collect { it.role } as Set
    }

    def beforeInsert() {
        encodePassword()
    }

    def beforeUpdate() {
        if (isDirty('password')) {
            encodePassword()
        }
    }

    protected void encodePassword() {
        password = springSecurityService.encodePassword(password)
    }
}

I appreciate your answer!