Created Notify_opsgenie (markdown)

Notify_opsgenie.md

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+## Opsgenie Notifications
+* **Source**: https://www.opsgenie.com
+* **Icon Support**: No
+* **Message Format**: Text
+* **Message Limit**: 15000 Characters per Message
+
+### Account Setup
+1. Visit https://www.opsgenie.com to create your account.
+2. [Generate your Integration API Key](https://app.opsgenie.com/settings/integration/add/API/)
+
+### Syntax
+The syntax is as follows:
+-  `opsgenie://{apikey}/`
+-  `opsgenie://{apikey}/@{user}`
+-  `opsgenie://{apikey}/@{user1}/@{user2}/@{userN}`
+-  `opsgenie://{apikey}/*{schedule}`
+-  `opsgenie://{apikey}/*{schedule1}}/*{schedule2}`}/*{scheduleN}``
+-  `opsgenie://{apikey}/^{escalation}`
+-  `opsgenie://{apikey}/^{escalation1}/^{escalation2}/^{escalationN}`
+-  `opsgenie://{apikey}/#{team}`
+-  `opsgenie://{apikey}/#{team1}/#{team2}/#{teamN}`
+
+**Note:** If no prefix character is specified, then the target is presumed to be a user (an `@` symbol is presumed to be in front of it).
+
+You can also mix/match the targets:
+- `opsgenie://{apikey}/@{user}/#{team}/*{schedule}/^{escalation}`
+
+### Parameter Breakdown
+| Variable    | Required | Description
+| ----------- | -------- | -----------
+| apikey      | Yes      | This is the API Key associated with your Opsgenie account.
+| user        | No       | The user you wish to notify; this can be a `username`, `email`, or `uuid4`. This is the assumed default target type to notify, but it is advised you prefix all users with a `@` symbol to eliminate any ambiguity.
+| team        | No       | The team you wish to notify; this can be the team name itself, or or `uuid4` associated with it. <br>**Note:** Teams must be prefixed with a `#` symbol.
+| schedule    | No       | The schedule you wish to notify; this can be the schedule name itself, or or `uuid4` associated with it. <br>**Note:** Schedules must be prefixed with a `*` symbol.
+| escalation  | No       | The escalation you wish to notify; this can be the escalation name itself, or or `uuid4` associated with it. <br>**Note:**Escalations must be prefixed with a `^` symbol.
+| region      | No       | The 2 character region code.  By default this is set to `us` if not specified. Europeans must set this to `eu` to work correctly.
+| batch       | No       | Set it to **Yes** if you want all identified targets to be notified notified in batches (instead of individually). By default this is set to **No**.
+| tags        | No       | A comma separated list of tags you can associate with your Opsgenie message
+| priority    | No       | The priority to associate with the message.  It is on a scale between 1 and 5. The default value is `3` if not specified.
+| alias       | No       | The alias to associate with the message.
+| entity      | No       | The entity to associate with the message.
+
+#### Example
+Send a Opsgenie notification to all devices associated with a project:
+```bash
+# Assume:
+#  - our {apikey} is a6k4ABnck26hDh8AA3EDHoOVdDEUlw3nty
+apprise -vv -t "Test Message Title" -b "Test Message Body" \
+   onesignal://a6k4ABnck26hDh8AA3EDHoOVdDEUlw3nty
+```