Add initial Microsoft Teams support

Documentation on https://github.com/42wim/matterbridge/wiki/MS-Teams-setup

vendor/github.com/yaegashi/msgraph.go/beta/UnifiedRoleAssignmentModel.go

@@ -0,0 +1,19 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// UnifiedRoleAssignment undocumented
+type UnifiedRoleAssignment struct {
+	// Entity is the base model of UnifiedRoleAssignment
+	Entity
+	// PrincipalID undocumented
+	PrincipalID *string `json:"principalId,omitempty"`
+	// ResourceScope undocumented
+	ResourceScope *string `json:"resourceScope,omitempty"`
+	// RoleDefinitionID undocumented
+	RoleDefinitionID *string `json:"roleDefinitionId,omitempty"`
+	// Principal undocumented
+	Principal *DirectoryObject `json:"principal,omitempty"`
+	// RoleDefinition undocumented
+	RoleDefinition *UnifiedRoleDefinition `json:"roleDefinition,omitempty"`
+}