diff --git a/src/prepareRequest.js b/src/prepareRequest.js
index 7370692..13e0d77 100644
--- a/src/prepareRequest.js
+++ b/src/prepareRequest.js
@@ -11,11 +11,7 @@ function prepareRequest (data) {
     if (config.appToken) {
         myHeaders.append('App-Token', config.appToken)
     }
-
-    if (config.sessionToken) {
-        myHeaders.append('Authorization', `user_token ${config.sessionToken}`)        
-    }
-
+                         
     switch (data.function) {
         case 'initSessionByCredentials': 
             myHeaders.append('Authorization', `Basic ${Buffer.from(`${data.userName}:${data.userPassword}`).toString('base64')}`)
@@ -26,10 +22,19 @@ function prepareRequest (data) {
             url = `${url}/initSession?user_token=${data.userToken}`
             myInit = { method: 'GET' }
         break
+        case 'killSession': 
+            myHeaders.append('Accept', 'text/html, application/xhtml+xml, application/xml;q=0.9, */*;q=0.8')
+            url = `${url}/killSession`
+            myInit = { method: 'GET' }
+        break
         default:
         break
     }
 
+    if (config.sessionToken) {
+        url = `${url}?session_token=${config.sessionToken}`        
+    }
+
     myInit = {
         ...myInit,
         headers: myHeaders
diff --git a/src/restclient.js b/src/restclient.js
index 1c17d0d..be62460 100644
--- a/src/restclient.js
+++ b/src/restclient.js
@@ -32,14 +32,30 @@ class GlpiRestClient {
         config.appToken = appToken
     }
 
-    _makeRequest (myRequest, responseHandler) {
+    _makeRequest (myRequest, funct, responseHandler) {
         fetch (myRequest)
             .then((resp) => {        
-                if (resp.headers.get('Content-Type').indexOf("application/json") >= 0) {
-                    responseHandler(resp.json())
-                } else {
-                    responseHandler(resp.text())
+  
+                switch (funct) {
+
+                    case 'initSessionByCredentials':
+                    case 'initSessionByUserToken':
+                        responseHandler(resp.json())
+                    break
+
+                    case 'killSession':
+                        if (resp.ok) {
+                            responseHandler(resp.text())                            
+                        } else {
+                            responseHandler(resp.json()) 
+                        }
+                    break
+                    
+                    default:
+                        responseHandler(resp.text())
+                    break
                 }
+
             }) 
             .catch((err) => {
                 responseHandler(err)
@@ -54,11 +70,15 @@ class GlpiRestClient {
                     userName,
                     userPassword
                 }
-                this._makeRequest( prepareRequest(data), (response) => {
-                    if (response.session_token) {
-                        config.sessionToken = response.session_token
-                    }
-                    resolve ( response ) 
+                this._makeRequest( prepareRequest(data), 'initSessionByCredentials', (promise) => {
+                    promise.then(response => {
+                        console.log('response')
+                        console.log(response)
+                        if (response.session_token) {
+                            config.sessionToken = response.session_token
+                        }
+                        resolve ( response ) 
+                    })
                 })
             }
             catch (err) {
@@ -74,11 +94,32 @@ class GlpiRestClient {
                     function: 'initSessionByUserToken',
                     userToken
                 }
-                this._makeRequest( prepareRequest(data), (response) => {
-                    if (response.session_token) {
-                        config.sessionToken = response.session_token
-                    }
-                    resolve ( response ) 
+                this._makeRequest( prepareRequest(data), 'initSessionByUserToken', (promise) => {
+                    promise.then(response => {
+                        if (response.session_token) {
+                            config.sessionToken = response.session_token
+                        }
+                        resolve ( response ) 
+                    })
+                })
+            }
+            catch (err) {
+                reject(err)
+            }
+        })
+    }
+
+    killSession () {
+        return new Promise((resolve, reject) => {
+            try {
+                const data = {
+                    function: 'killSession'
+                }
+                this._makeRequest( prepareRequest(data), 'killSession', (promise) => {
+                    promise.then(response => {
+                        config.sessionToken = ''
+                        resolve ( response ) 
+                    })
                 })
             }
             catch (err) {