public async Task<IHttpActionResult> PostPartner(Partner partner)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }
            partner.Id = Guid.NewGuid();
            partner.validation_id = Guid.NewGuid();
            partner.activated = false;
            partner.date_created = DateTime.Today;
            db.Partners.Add(partner);

            try
            {
                await db.SaveChangesAsync();
            }
            catch (DbUpdateException)
            {
                if (PartnerExists(partner.Id))
                {
                    return Conflict();
                }
                else
                {
                    throw;
                }
            }

            return CreatedAtRoute("DefaultApi", new { id = partner.Id }, partner);
        }   
        public async Task<IHttpActionResult> PutPartner(Guid id, Partner partner)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != partner.Id)
            {
                return BadRequest();
            }

            db.Entry(partner).State = EntityState.Modified;

            try
            {
                await db.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!PartnerExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return StatusCode(HttpStatusCode.NoContent);
        }