erreur : param is missing or the value is empty: project_member

gistfile1.txt

def new_team

    @team = ProjectMember.new(team_params)
    if @team.save
      render json: {
        status: "ok",
        id: id,
        lastname: lastname,
        firstname: firstname,
        role: role,
        bio: bio,

      }
    else
      render json: {
        status: "erreur",
      }
    end
  end


private
def team_params
    params.require(:project_member).permit(:firstname, :lastname, :role, :bio, :project)
end