Basic Login functionality for you web app using Gatling DSL.

login.scala

Make sure you have "login.csv" in gatling data folder and 
"login.csv" contains proper creadentials to login into your web app.
 
package mywebapp.lib
 
import scala.concurrent.duration._
import io.gatling.core.Predef._
import io.gatling.http.Predef._
import io.gatling.jdbc.Predef._
import mywebapp.config._
 
object Login {
 
  val headers_10 = GatlingConfig.headers_10
    val feeder = csv("login.csv").circular//queue :- will move step by step
    //circular :- it iterate over whatever number of rows available.
 
    val login = exec(http("Login")
     .get("/login"))
    .pause(1)
    .feed(feeder)
    .exec(http("authorization")
      .post("/auth")
      .headers(headers_10)
      .queryParam("""email""", "${email}")
      .queryParam("""password""", "${password}")
      .check(status.is(200))
      .check(jsonPath("$.Message").is("Success")))
    .pause(1)
}