Add the User model and its repository.

src/test/groovy/space/kklochko/spring_rest_example/db/repositories/UserRepositorySpec.groovy

@@ -0,0 +1,59 @@
+package space.kklochko.spring_rest_example.db.repositories
+
+import groovy.sql.Sql
+import jakarta.persistence.EntityManager
+import space.kklochko.spring_rest_example.config.factories.LoadDataBaseConfigFromEnvFile
+import space.kklochko.spring_rest_example.config.models.DataBaseConfig
+import space.kklochko.spring_rest_example.db.factories.DataBaseConnection
+import space.kklochko.spring_rest_example.db.factories.EntityManagerConnection
+import space.kklochko.spring_rest_example.models.Token
+import space.kklochko.spring_rest_example.models.User
+import spock.lang.Shared
+import spock.lang.Specification
+import spock.lang.Stepwise
+import spock.lang.Subject
+
+@Stepwise
+class UserRepositorySpec extends Specification {
+    def "Read one user"() {
+        given: "I have a repo"
+        @Subject
+        UserRepository repo = new UserRepository()
+
+        when: "reading the entry"
+        def result = repo.read(username)
+
+        then: "checking that the reading was successful"
+        result
+
+        and: "the user has a role"
+        with(result) {
+            getRole() == expectedRole
+            getPassword() == expectedPassword
+        }
+
+        where: "the expected data"
+        username || expectedRole | expectedPassword
+        "admin"  || "ADMIN"      | "8c6976e5b5410415bde908bd4dee15dfb167a9c873fc4bb8a81f6f2ab448a918"
+        "user"   || "USER"       | "04f8996da763b7a969b1028ee3007569eaf3a635486ddab211d512c85b9df8fb"
+    }
+
+    def "Read one user and check if exists"() {
+        given: "I have a repo"
+        @Subject
+        UserRepository repo = new UserRepository()
+
+        when: "reading the entry"
+        def result = repo.read(username)
+
+        then: "checking that the reading was successful"
+        isNull == (result == null)
+
+        where: "the expected data"
+        username || isNull
+        "admin"  || false
+        "user"   || false
+        "user2"  || true
+    }
+}
+